Knights Armament M5 Rifle Rail Adapter System (RAS) Forend Assembly

Knights Armament M5 Rifle Rail Adapter System (RAS) Forend Assembly

Upgrade your rifle-length AR-15 setup or M16A4 clone with authentic military heritage using the Knight's Armament Company (KAC) M5 Rifle RAS Forend Assembly (PN: 98065). Developed specifically for the U.S. Military's M16A4 service rifle and issued to hundreds of thousands of service members under NSN 1005-01-452-6771, the M5 Rail Adapter System (RAS) stands as one of the most battle-proven handguards in firearm history. Designed as a direct drop-in replacement for standard 2-piece polymer A2 handguards, it instantly transforms your rifle by providing full-length, genuine Mil-Spec M1913 Picatinny rails for tactical accessories like lights, foregrips, lasers, and optics.

Measuring 11.5 inches in length and weighing 14.4 ounces, this non-free-float quad rail sets itself apart from basic drop-in handguards through its proprietary barrel nut locking mechanism. Utilizing an internal clamp and locking screw arrangement, the assembly secures firmly directly to the rifle's barrel nut, eliminating handguard play and offering an unyielding foundation. Precision-machined from high-strength aluminum and finished in durable black hardcoat anodizing, the M5 RAS kit comes complete with three genuine KAC 11-Rib rail panels to protect rail teeth, shield hands from barrel heat, and optimize grip ergonomics.

Features

U.S. Military Issued M16A4 Heritage (NSN 1005-01-452-6771):
Officially developed for and issued to the U.S. Armed Forces, delivering a battle-tested track record for extreme durability and operational reliability.

Proprietary Barrel Nut Clamp Mechanism:
Secures firmly to the rifle’s barrel nut via an internal clamp and screw arrangement, preventing handguard twist and providing a solid mounting platform for accessories.

Full-Length Mil-Spec M1913 Picatinny Quad Rail:
Features precision-machined 1913 Picatinny rails along all four quadrants (top, bottom, left, right) for maximum accessory versatility.

Includes 3x Genuine KAC 11-Rib Rail Cover Panels:
Ships with three authentic KAC polymer rail panels to shield unmounted rail sections, manage barrel heat, and ensure a comfortable firing grip.

Direct Drop-In Upgrade:
Designed for quick replacement of standard 2-piece polymer A2 handguards on AR-15/SR-15 rifles equipped with a rifle-length gas system and delta ring assembly.

Specifications