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Thomas, yes Sir. This "Carbine Length Quad Rail" will wotk on the Ruger. The 7" length is max without having to replace the gas block. A good rundown is post #2 here : https://rugerforum.net/ruger-semi-auto/174257-need-help-can-you-free-float-ruger-ar-556-if-so-how-what-longest-free.html

yes it will fit and work just fine