M5 Rifle RAS Forend Assembly for M16

The KAC M5 RAS (Rail Adapter System) was developed for use on the US military’s M16A4, and with hundreds of thousands of rails issued to date, it is one of the most battle proven designs available for the AR-15 platform.

This is "New Old Stock," which means that it was produced years back, but has not been used.  Some markings might be different from current production, but it is the same item.  Also, NOS means that the box and packing might be damaged or replaced.

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. What sets the M5 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.

Includes three KAC 11 Rib Rail Panels.  Vertical grip is an optional add-on.

Rifle Requirements: The M5 RAS is a drop-in replacement part for standard, 2-piece polymer, A2-type handguards. The rifle must have a rifle length gas system, delta ring assembly, fixed front sight/gas block, and either a round or triangular handguard end cap. Lighter barrel profiles work best (Government contours). Heavier barrel contours may require modification to the inside of the rail. For AR-15/SR-15 based platforms only; not compatible with SR-25 variants.

As these are military RAS rails, they tend to fit best on military brand rifles, like Colt, FN, LMT, KAC, etc.  Others may fit well, but the tolerances are rather tight and anticipates that the Delta Ring and spring assembly just perfectly fit the RAS rail into the handguard clips at the front sight base.  The military rifle companies have that down, and make every barrel the DOD spec.  Other companies can get by with sloppier tolerances, as the plastic handguards are more forgiving than the RAS quad rail.

Specifications