For AR-15/SR-15 based platforms only not compatible with SR-25 variants. Heavier barrel contours may require modification to the inside of the rail. The rifle must have a carbine length gas system, delta ring. Lighter barrel profiles work best (M4 or Government contours). The KAC M4 RAS is a drop-in replacement part for standard, 2-piece polymer, M4-type handguards. The rifle must have a carbine length gas system, delta ring assembly, fixed front sight/gas block, and round handguard end cap.
Rifle Requirements: The 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.
M4 carbine quad rail handguards upgrade#
This non-free float handguard is a simple-to-install, drop-in upgrade that features genuine Mil-Spec M1913 Picatinny Rails along its entire length. It adds a little heft to the front of the weapon but for those that think the hand guard on a standard m4 is too short then it is well worth it. When installing the 2-piece design no gunsmithing is required.
Made of black anodized aircraft grade aluminum and compatible with most direct impingement gas systems.
M4 carbine quad rail handguards install#
The KAC M4 RAS (Rail Adapter System) was developed for use on the US military’s M4 Carbine, and with over 1 million rails issued to date, it is one of the most battle proven designs available for the AR-15 platform. Comments about ERGO Carbine Handguard Extension AR-15/M16/M4 4 Rail Aluminum Black. The M4 carbine length drop-in quad rail is an easy to install upgrade for the basic carbine.
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