<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>0013 - Disclosure - Common Stock</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>1</Level><ElementName>MSTG_CommonStockAbstract</ElementName><ElementPrefix>MSTG_</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>CommonStockAbstract</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>MSTG_CommonStockTextBlock</ElementName><ElementPrefix>MSTG_</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="From2013-01-01to2013-06-30" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;In February 2007, the Company issued 64,000,000
shares of common stock at $0.0000125 per share to the Founders of the Company for $800.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;In February 2008, the Company sold 22,400,000
shares of common stock at $0.002 per share pursuant to its public offering.&amp;#160;&amp;#160;The Company received net proceeds of $44,964.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;In February 2008, the Company issued 800,000 shares
of common stock with the fair value of $0.0075 per share for services rendered.&amp;#160;&amp;#160;The Company recorded stock based compensation
expense of $6,000 in connection with this issuance.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On December 13, 2010, the Company issued 20,000,000
shares of common stock as payment for certain mining leases in Honduras at a fair value of $2,500.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On December 15, 2010, the Company notified FINRA
of its intention to implement a 1 for 8 share dividend or forward stock split of its issued and outstanding common stock to the
holders of record as of December 27, 2010 (the &amp;#147;Shareholders&amp;#148;). The forward stock split became effective as of the
start of business on January 3, 2011.&amp;#160;&amp;#160;All share and per share data have been retroactively restated to reflect this
recapitalization.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On February 22, 2011, the Company issued 20,000,000
shares of common stock as payment for certain additional mining leases in Honduras at a fair value of $2,500.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On March 28, 2011, the Company sold 60,000 units
consisting of 60,000 shares of common stock and 30,000 warrants for $15,000.&amp;#160;&amp;#160;The warrants are exercisable at $0.25 per
share and have a two year term.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On March 31, 2011, the Company's CEO retired 30,000,000
shares of his common stock of the Company as additional paid-in capital.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On April 12, 2011, the Company sold 1,000,000
units consisting of 1,000,000 shares of common stock and 500,000 warrants for cash of $250,000.&amp;#160;&amp;#160;The warrants are exercisable
at $0.25 per share and have a two year term expiring April 12, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On April 20, 2011, the Company sold 100,000 units
consisting of 100,000 shares of common stock and 50,000 warrants for cash of $25,000.&amp;#160;&amp;#160;The warrants are exercisable at
$0.25 per share and have a two year term expiring April 20, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On April 21, 2011, the Company sold 100,000 units
consisting of 100,000 shares of common stock and 50,000 warrants for cash of $25,000.&amp;#160;&amp;#160;The warrants are exercisable at
$0.25 per share and have a two year term expiring April 21, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On May 6, 2011, the Company sold 60,000 units
consisting of 60,000 shares of common stock and 30,000 warrants for cash of $15,000.&amp;#160;&amp;#160;The warrants are exercisable at
$0.25 per share and have a two year term expiring May 6, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On May 11, 2011, the Company sold 20,000 units
consisting of 20,000 shares of common stock and 10,000 warrants for cash of $5,000.&amp;#160;&amp;#160;The warrants are exercisable at
$0.25 per share and have a two year term expiring May 11, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On July 19, 2011, the Company issued 40,000 units
to Mark Holcombe, a director of the Company in consideration of consisting of 40,000 shares of common stock and 20,000 warrants
with a fair value of $1,583. Each warrant allows Mr. Holcombe to purchase one additional share of common stock at a price of $0.50
per share for two years expiring July 19, 2013.&amp;#160;&amp;#160;The shares were valued at $10,000 ($0.25 per share), the fair value
on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On July 21, 2011, the Company issued 100,000 shares
to Lawrence H. Wolfe, the Chief Financial Officer at the time, in consideration for the execution and delivery of a consulting
agreement with Mr. Wolfe.&amp;#160;&amp;#160;The shares were valued at $24,000 ($0.24 per share), the fair value on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On July 21, 2011, the Company issued 100,000 shares
to Zegal and Ross Capital LLC in consideration for the execution and delivery of a consulting agreement. The shares were valued
at $24,000 ($0.24 per share), the fair value on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On July 25, 2011, the Company issued 100,000 shares
to Mendel Mochkin, a director, in consideration for the execution and delivery of a consulting agreement that replaced Mr. Mochkin's
employment agreement entirely. Mr. Mochkin is an accredited investor. The issuance was conducted in reliance upon an exemption
from registration provided under Section 4(2) of the Securities Act of 1933, as amended.&amp;#160;&amp;#160;The shares were valued at $24,000
($0.24 per share), the fair value on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On July 27, 2011, the Company sold 1,000,000 units
in consideration of $250,000 consisting of 1,000,000 shares of common stock and 1,000,000 warrants. Each warrant allows for the
purchase one additional share of common stock at a price of $0.25 per share for two years expiring July 27, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;During 2011, the principal stockholder forgave
consulting fees of $12,000. The amount was recorded as an in-kind contribution.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;On October 24, 2011, the Company issued 20,000
shares to Ben Lafazan and 20,000 shares to Barry Wolinetz as partial settlement for services rendered. The shares were valued at
$0.22 per share, the fair value on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;At December 31, 2011, the Company has 297,516
shares issuable to officers and directors with a fair value of $74,000 in connection with certain consulting agreements.&amp;#160;&amp;#160;These
shares were valued at the fair value on the date of grant.&amp;#160;&amp;#160;These shares were issued to officers and directors during
March, 2012.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&amp;#160;&amp;#160;On February 3, 2012, the Company
issued 200,000 shares of common stock as payment for certain mining equipments in Honduras at a fair value of $106,000 based on
the value of the equipment.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;In February 2012, the company issued 175,000 units
and raised an aggregate of $175,000 from one investor under a Regulation S Subscription Agreement. Under this agreement, the Company
is offering for sale up to $500,000 of shares and warrants at a purchase price of $1.00 per share. For each dollar invested, the
investor will receive one share of common stock and one warrant. Each warrant entitles the investor to purchase one share of common
stock for $1.50 per share. The warrants expire on the third anniversary date its issuance in February 2015.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;On March 1, 2012, an investor
exercised his right to purchase 30,000 shares for $0.50 per share. The Company received proceeds of $15,000.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;In August 2012, the Company
raised an aggregate of $34,000 from one investor under a Regulation S Subscription Agreement in exchange for 680,000 shares of
common stock at $0.05 per share and 340,000 warrants exercisable at $0.20 per share.&amp;#160;&amp;#160;&amp;#160;The warrants expire on the
fifth anniversary date of its issuance in August 2017.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;On August 28, 2012, the Company
issued 3,000,000 shares of common stock to three consultants in consideration for services previously provided. The shares were
valued at $0.07 per share, the fair value on the date of grant of $210,000.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;At December 31, 2012, the
Company has 235,318 shares issuable to officers and directors with a fair value of $88,000 in connection with certain consulting
agreements.&amp;#160;&amp;#160;These shares were valued at the fair value on the date of grant.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;During 2012, an officer forgave
consulting fees of $57,000. The amount was recorded as an in-kind contribution.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;On February 15, 2013, the
Company issued 2,500,000 shares of common stock in connection with issuance of convertible debt of $45,000. These shares were valued
at the fair value on the date of grant (See note 6).&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;During May 2013, the Board
of Directors approved resolutions for the issuance of a total of 30,000,000 shares of the Company&amp;#146;s restricted common stock
to Mr. Sternheim (our CEO) to discharge $300,000 of amounts due to him at $0.01 per share. The transaction was recorded at the
fair value of the stocks on the grant date of $1,800,000 ($0.06 per share). The difference between the debt discharged and the
fair value was recorded as stock compensation expense (See note 10).&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;u&gt;Warrants&lt;/u&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;During 2011, the Company
issued 1,690,000 warrants in connection with a private placement offering. The warrants have a term of two years from the date
of the subscription agreement and allow investors to purchase one share of common stock for $0.50.&amp;#160;&amp;#160;The 640,000 warrants
expired during the six months ended June 30, 2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;In February 2012, the company
issued 175,000 warrants in connection with a private placement offering. The warrants have a term of three years from the date
of the subscription agreement and allow investors to purchase one share of common stock for $1.50 per share.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In August 2012, the company issued 340,000
warrants in connection with a private placement offering. The warrants have a term of five years from the date of the subscription
agreement and allow investors to purchase one share of common stock for $0.20 per share.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;On June 28, 2013, the Company
issued a 5-year warrantto purchase 13,500,000 shares of common stock at an exercise price of $0.15 per share in connection with
issuance of convertible debt of $1,350,000. These shares were valued at the fair value on the date of grant (See note 6).&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 63pt"&gt;Information with respect
to warrants outstanding and exercisable at June 30, 2013 is as follows:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%"&gt;
&lt;tr&gt;
    &lt;td style="vertical-align: bottom"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom; border-bottom: black 1.5pt solid"&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Number&lt;/b&gt;&lt;/p&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Outstanding&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom; border-bottom: black 1.5pt solid"&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Range of&lt;/b&gt;&lt;/p&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercise Price&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom; border-bottom: black 1.5pt solid"&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Number&lt;/b&gt;&lt;/p&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Exercisable&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;
    &lt;td style="vertical-align: bottom"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="vertical-align: bottom"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background-color: #CCEEFF"&gt;
    &lt;td style="vertical-align: bottom; width: 67%"&gt;&lt;font style="font-size: 10pt"&gt;&lt;b&gt;Warrants outstanding, December 31, 2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 8%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;2,175,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 8%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.20-1.50&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 8%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;2,175,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background-color: white"&gt;
    &lt;td style="vertical-align: bottom"&gt;&lt;font style="font-size: 10pt"&gt;&lt;b&gt;Issued&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;13,500,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.15&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;13,500,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background-color: #CCEEFF"&gt;
    &lt;td style="vertical-align: bottom"&gt;&lt;font style="font-size: 10pt"&gt;&lt;b&gt;Exercised&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background-color: white"&gt;
    &lt;td style="vertical-align: bottom"&gt;&lt;font style="font-size: 10pt"&gt;&lt;b&gt;Expired/Forfeited&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;(640,000)&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.50&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right; text-indent: 0in"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background-color: #CCEEFF"&gt;
    &lt;td style="vertical-align: bottom"&gt;&lt;font style="font-size: 10pt"&gt;&lt;b&gt;Warrants outstanding, June 30, 2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;15,035,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&lt;font style="font-size: 10pt"&gt;$&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.20-1.50&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="vertical-align: top; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;15,035,000&lt;/font&gt;&lt;/td&gt;
    &lt;td style="vertical-align: top"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;&lt;u&gt;Options&lt;/u&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;There were no options issued during the six months ended June 30,
2013.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 1in"&gt;During July 2011, the Company
granted 360,000 stock options to consultants for services to be rendered over a two-year period.&amp;#160;&amp;#160;The options are exercisable
at $0.50 per share, half of the option shall vest on January 1 and half on June 1 following the grant date. These options had a
fair value of $47,822 using the Black-Scholes option-pricing model. The grant date fair values of the Company&amp;#146;s option awards
during the years ended December 31, 2012 and 2011 were estimated using the Black Scholes option pricing model with the following
assumptions:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%"&gt;
&lt;tr style="vertical-align: bottom"&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For the six months&amp;#160;ended&lt;/b&gt;&lt;/p&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;June 30, 2013&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td colspan="2" style="border-bottom: black 1.5pt solid"&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;For the six months&amp;#160;ended&lt;/b&gt;&lt;/p&gt;
        &lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;June 30, 2012&lt;/b&gt;&lt;/p&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;
    &lt;td style="width: 78%"&gt;&lt;font style="font-size: 10pt"&gt;Expected life (years)&lt;/font&gt;&lt;/td&gt;
    &lt;td style="width: 1%; text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="width: 8%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap" style="width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="width: 1%; text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="width: 1%"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="width: 8%; text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;2&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap" style="width: 1%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: bottom; background-color: white"&gt;
    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;Risk &amp;#150; free interest rate&lt;/font&gt;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.40&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&lt;font style="font-size: 10pt"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: bottom; background-color: #CCEEFF"&gt;
    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;Expected volatility&lt;/font&gt;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;178&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&lt;font style="font-size: 10pt"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: bottom; background-color: white"&gt;
    &lt;td&gt;&lt;font style="font-size: 10pt"&gt;Dividend Yield&lt;/font&gt;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;-&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&amp;#160;&lt;/td&gt;
    &lt;td&gt;&amp;#160;&lt;/td&gt;
    &lt;td style="text-align: right"&gt;&lt;font style="font-size: 10pt"&gt;0.00&lt;/font&gt;&lt;/td&gt;
    &lt;td nowrap="nowrap"&gt;&lt;font style="font-size: 10pt"&gt;%&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;The Company had Consultancy agreements that contain
provisions for the issuance and granting of options aggregating 3,000,000 shares at $0.50 per share that were predicated on the
Company reaching certain milestones in the production of gold.&amp;#160;&amp;#160;None of the milestones were met and accordingly such
options were not granted or issued.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in; text-align: justify"&gt;&amp;#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in; text-align: justify"&gt;During the third quarter of 2012, all the consultancy
agreements noted above were terminated. As a result, the 360,000 stock options and 3,000,000 grant options were forfeited.&lt;/p&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>Custom Element.</ElementDefenition><ElementReferences>No definition available.</ElementReferences><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>NOTE 7 - Common Stock</Label></Row></Rows><Footnotes /><IsEquityReport>false</IsEquityReport><ReportName>Common Stock</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>true</HasCustomUnits><IsEmbedReport>false</IsEmbedReport><IsMultiCurrency>false</IsMultiCurrency><ReportType>Sheet</ReportType><RoleURI>http://mstg.com/role/CommonStock</RoleURI><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows></InstanceReport>
