![]() ![]() For AR15/SR15 based platforms only not compatible with SR-25 variants. Heavier barrel contours may require modification to the inside of the rail. Lighter barrel profiles work best (M4 or Government contours). The rifle must have a carbine length gas system, delta ring assembly, fixed front sight/gas block, and round handguard end cap. The KAC M4 RAS is a drop-in replacement part for standard, 2-piece polymer, M4-type handguards. What sets the M4 RAS apart from other 2-piece quad rails on the market is that it securely locks to the rifle’s barrel nut via a clamp and screw arrangement, making it a very solid foundation upon which to mount tactical accessories. To view our detailed guide on how to install an AR-15 free float quad rail or keymod handguard, please visit our guide page here. This handguard is a simple-to-install, drop-in upgrade that features genuine Mil-Spec M1913 Picatinny Rails along its entire length. We carry hundreds of the top leading brands. We the Ar15 handguard pride ourselves on having a wide variety of all kind of Ar15 handguard and all its accessories. Ar15 Handguard is the best single source for all things relating to the Ar15 handguard in USA. With over 1 million rails issued to date, it is one of the most battle proven designs available for the AR15 platform. AR15 QUAD RAIL HANDGUARD/ FREE FLOAT HANDGUARD. The Knights Armament M4 RAS (Rail Adapter System) was developed for use on US military M4 Carbines utilized a 14.5 or 16″ barrel. ![]() ![]() ![]() Knights RAS 7″ Drop-In AR15/M4 Carbine Length Quad Rail Description: ![]()
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