SUMMARY PROSPECTUS – MAY 1, 2011 RS Investment Quality Bond Fund

Share Class (Ticker):   Class A (GUIQX),   Class B (RIQBX),   Class C (RIQCX),   Class K (RIQKX) Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus and other information about the Fund, including the Fund’s Statement of Additional Information (SAI) and most recent reports to shareholders, online at www.RSinvestments.com/Communications/ProspectusesandAnnualReports.htm. You can also get this information at no cost by calling 800-766-3863 or by sending an e-mail request to prospectus@rsinvestments.com. You can also get this information from your financial intermediary. This Summary Prospectus incorporates by reference the Fund’s Prospectus and SAI, each dated May 1, 2011, and the financial statements included in the Fund’s annual report to shareholders, dated December 31, 2010.

Investment Objectives

To seek a high level of current income and capital appreciation without undue risk to principal.

Fees and Expenses of the Fund

The tables below describe the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts for the purchase of Class A shares if you and your family invest, or agree to invest in the future, at least $100,000 in RS Funds. More information about these and other discounts is available from your financial professional and in the “Types of Shares Available — Class A Shares” section on page 113 of the Fund’s prospectus and the “Waivers of Certain Sales Loads” section on page 38 of the Fund’s statement of additional information.

Shareholder Fees (fees paid directly from your investment)
Share Class	Class A			Class B			Class C			Class K
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)		3.75%			None			None			None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of sale proceeds or the original offering price)		None	1		3.00%	2		1.00%	3		None
Annual Fund Operating Expenses (expenses are deducted from Fund assets as a percentage of average daily net assets)
Share Class	Class A			Class B			Class C			Class K
Management Fees		0.50%			0.50%			0.50%			0.50%
Distribution (12b-1) Fees		0.25%			1.00%			1.00%			0.65%
Other Expenses		0.29%			0.32%			0.30%			0.35%
Total Annual Fund Operating Expenses4		1.04%			1.82%			1.80%			1.50%
Fee Waiver/Expense Reimbursement4		-0.19%			-0.22%			-0.20%			-0.25%
Net Expenses4		0.85%			1.60%			1.60%			1.25%

1 Contingent deferred sales load of 1.00% applies to purchases of $1 million or more of Class A shares if these shares are sold within 18 months of purchase.

2 Maximum contingent deferred sales load declines to 2.00% if shares are sold in year 3 or 4 after purchase; 1.00% in year 5 or 6; and 0.00% in year 7 and beyond.

3 Contingent deferred sales load applies for shares sold within one year of purchase.

4 An expense reimbursement with respect to the Fund’s Total Annual Fund Operating Expenses is imposed pursuant to a written agreement in effect through April 30, 2012. The effect of this reimbursement is reflected under “Fee Waiver/Expense Reimbursement.” “Net Expenses” reflect the effect of this expense reimbursement on Total Annual Fund Operating Expenses. This expense reimbursement will continue through April 30, 2012, and cannot be terminated by RS Investments prior to that date.

Example

This Example is intended to help you compare the cost of investing in the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. This Example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses remain the same as shown above. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	Assuming Redemption at End of Period								Assuming No Redemption
	Class A		Class B		Class C		Class K		Class A		Class B		Class C		Class K
1 Year	$	459	$	463	$	263	$	127	$	459	$	163	$	163	$	127
3 Years	$	675	$	751	$	547	$	450	$	675	$	551	$	547	$	450
5 Years	$	910	$	1,065	$	956	$	795	$	910	$	965	$	956	$	795
10 Years	$	1,582	$	1,905	$	2,100	$	1,769	$	1,582	$	1,905	$	2,100	$	1,769

RS INVESTMENT QUALITY BOND FUND

Portfolio Turnover

The Fund pays transaction costs when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes for you if your Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 129% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The Fund invests primarily in investment-grade securities, including corporate bonds, mortgage-backed and asset-backed securities, and obligations of the U.S. government and its agencies.

The Fund’s investment team allocates the Fund’s investments among the various sectors of the debt markets by analyzing overall economic conditions within and among these sectors. The Fund normally diversifies its asset allocations broadly among the debt securities markets but may emphasize some sectors over others based on their attractiveness relative to one another. Within sector allocations, the Fund’s investment team selects individual securities by considering the yield paid by the security, potential appreciation in the value of the security, credit quality of the issuer, maturity, and the degree of risk associated with a specific security relative to other securities in the sector.

The Fund seeks to maintain an intermediate duration (between three and 10 years) but may lengthen or shorten its duration within the intermediate range to reflect changes in the overall composition of the investment-grade debt markets. Duration is a measure of a bond price’s sensitivity to changes in interest rates. Generally, the longer a bond’s duration, the greater its price sensitivity to a change in interest rates. For example, the price of a bond with a duration of five years would be expected to fall approximately 5% if rates were to rise by one percentage point.

The Fund normally invests at least 80% of its net assets in investment-grade debt securities. Debt securities may include, for example, corporate bonds, mortgage-backed and asset-backed securities, zero-coupon bonds, and obligations of the U.S. government and its agencies and instrumentalities. An investment-grade security is one that is rated by Moody’s Investors Service, Inc., or Standard & Poor’s Ratings Group Baa3 or BBB-, respectively, or higher or, if unrated, that has been determined by the Fund’s investment team to be of comparable quality. The Fund may invest in lower-rated debt securities, commonly known as “high-yield” securities or “junk bonds”; normally, less than 10% of the Fund’s assets will be invested in lower-rated securities.

The Fund may also invest up to 10% of the value of its net assets in foreign securities denominated in foreign currencies. In addition, the Fund may invest without limit in so-called Yankee securities, which are debt securities issued by non-U.S. corporate or government entities but denominated in U.S. dollars.

The Fund may engage in dollar roll and reverse repurchase agreement transactions. The Fund also may enter into derivative transactions, such as index futures contracts, Treasury futures contracts, Eurodollar futures contracts, and interest rate swap agreements, to manage its exposure to interest rate risk or as a substitute for investments directly in debt securities. Although many of these instruments may exhibit characteristics of leveraged transactions, the Fund will not enter into derivatives transactions for the purpose of leveraging the Fund’s investment portfolio.

The Fund may invest in loans or other investments that have economic characteristics similar to loans of any maturity and credit quality. If the Fund invests in loans, the Fund’s investment team may seek to avoid the receipt of material non-public information about the issuers of the loans being considered for purchase by the Fund, which may affect its ability to assess the loans as compared to investors that do receive such information.

Principal Risks

You may lose money by investing in the Fund. The Fund may not achieve its investment objectives. The principal risks of investing in the Fund, which could adversely affect its net asset value and total return, are as follows.

Debt Securities Risk

The value of a debt security or other income-producing security changes in response to changes in interest rates and depends on the issuer’s credit quality.

Foreign Securities Risk

Foreign securities are subject to political, regulatory, and economic risks not present in domestic investments. In addition, when the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent that investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund.

Mortgage- and Asset-backed Securities Risk

During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security’s duration, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, or the underlying assets or collateral may be insufficient if the issuer defaults.

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RS INVESTMENT QUALITY BOND FUND

High-yield/Junk Bond Risk

Lower-quality debt securities can involve a substantially greater risk of default than higher quality debt securities, and their values can decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general.

Liquidity Risk

Lack of a ready market or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price. In addition, the Fund, by itself or together with other accounts managed by Guardian Investor Services LLC, may hold a position in a security that is large relative to the typical trading volume for that security, which can make it difficult for the Fund to dispose of the position at an advantageous time or price.

Portfolio Turnover Risk

Frequent purchases and sales of portfolio securities may result in higher Fund expenses and may result in more significant distributions of short-term capital gains to investors, which are taxed as ordinary income. In recent periods, the Fund has experienced annual portfolio turnover in excess of 100%.

Derivatives Risk

Derivative transactions can create investment leverage and may be highly volatile. It is possible that a derivative transaction will result in a loss greater than the principal amount invested, and the Fund may not be able to close out a derivative transaction at a favorable time or price.

Loan Risk

Investments in loans are generally subject to the same risks as investments in other types of debt securities, including, in many cases, investments in high-yield/junk bonds. They may be difficult to value and may be illiquid. If the Fund holds a loan through another financial institution, or relies on a financial institution to administer the loan, its receipt of principal and interest on the loan may be subject to the credit risk of that financial institution. It is possible that any collateral securing a loan may be insufficient or unavailable to the Fund, and that the Fund’s rights to collateral may be limited by bankruptcy or insolvency laws. There may be limited public information available regarding the loan.

Fund Performance

The bar chart below and table on the next page provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by comparing the Fund’s returns with those of a broad measure of market performance. The returns in the bar chart do not reflect the impact of sales loads. If they did, the returns would be lower than those shown. The Fund is the successor to The Guardian Investment Quality Bond Fund, a mutual fund with substantially similar investment objectives, strategies, and policies (the “Predecessor Fund”). The performance of the Fund provided in the chart and the table includes that of the Predecessor Fund for periods prior to October 9, 2006. The Fund’s past performance (before and after taxes) is not an indication of future performance. Updated performance information for the Fund is available at www.rsinvestments.com or by calling 800-766-3863.

Annual Total Return for Class A Shares (calendar year-end)

Best Quarter  Third Quarter 2009  5.27%            Worst Quarter  Second Quarter  2004  -2.63%

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RS INVESTMENT QUALITY BOND FUND

Average Annual Total Returns (periods ended 12/31/10)
	Inception Date of Share Class		1 Year		5 Years		10 Years		Since Inception
Class A Shares		2/16/93
Return Before Taxes				3.47%		4.64%		5.15%		5.34%
Return After Taxes on Distributions				1.93%		3.03%		3.43%		3.29%
Return After Taxes on Distributions and Sale of Fund Shares				2.48%		3.02%		3.40%		3.29%
Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)				6.54%		5.80%		5.84%		6.27%
Class B Shares		8/7/00		3.65%		4.47%		4.92%		5.20%
Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)				6.54%		5.80%		5.84%		6.17%
Class C Shares		8/7/00		5.64%		4.63%		4.77%		5.01%
Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)				6.54%		5.80%		5.84%		6.17%
Class K Shares		5/15/01		7.12%		5.02%		—		5.04%
Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)				6.54%		5.80%		—		5.79%

After-tax returns are shown for Class A shares only; after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Management of the Fund

Investment Adviser

RS Investment Management Co. LLC

Investment Sub-Adviser

Guardian Investor Services LLC

Investment Team

Howard W. Chin, co-portfolio manager, has managed the Fund since 1998. Robert J. Crimmins Jr., co-portfolio manager, has managed the Fund since 2004.

Purchase and Sale of Fund Shares

Investment Minimums	Class A		Class B		Class C		Class K
Minimum Initial Investment	$	2,500	$	2,500	$	2,500	$	1,000
Minimum Subsequent Investments	$	100	$	100	$	100		None

A $1,000 minimum purchase amount and a $100 minimum subsequent purchase amount apply for Individual Retirement Accounts (IRAs), gift/transfer to minor accounts, automatic investment plans, and qualified retirement plans. A $25 minimum initial and subsequent purchase amount applies for payroll deduction accounts.

You may redeem your shares on any business day when the New York Stock Exchange is open by mail (Boston Financial Data Services, RS Investment Quality Bond Fund, P.O. Box 219717, Kansas City, MO 64121-9717), by telephone (800-766-3863), or online (www.RSinvestments.com).

Tax Information

The Fund normally distributes its net investment income and net realized capital gains, if any, to shareholders. These distributions are generally taxable to you as ordinary income or capital gains, unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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