Knights Armament Free Float RAS MK12 Mod1 Rail

Knights Armament Free Float RAS MK12 Mod1 Rail

The Knights Armament Free Float RAS has more than proven itself on the battlefield; famously used on Naval Special Warfare Command's Mk12 Mod1 special purpose rifle. The RAS (Rail Adapter System) features full length 12-inch mil-spec M1913 picatinny rails at the 12, 3, 6, and 9 o’clock positions, making it compatible with a variety of rail-mounted tactical accessories. The rail free floats the barrel, allowing for consistent barrel harmonics upon firing, and increased accuracy potential. 

The Knight's Free Float RAS is compatible with rifle, carbine and mid length gas systems and requires use of a low profile gas block. Disassembly of the rifle’s gas system and removal of the factory barrel nut will be necessary. This forend uses a proprietary barrel nut that may be installed using a standard AR-15 armorer’s barrel nut wrench (sold separately). For AR15 / SR15 based platforms only. Installation instructions are included. 

True Free-Float Design
Eliminates barrel contact to improve accuracy and maintain consistent barrel harmonics.

Battle-Proven Platform
Used on the Mk12 Mod 1 special purpose rifle by Naval Special Warfare Command.

Full-Length Quad Rail System
MIL-STD M1913 Picatinny rails at 12, 3, 6, and 9 o’clock for maximum accessory mounting flexibility.

Aircraft-Grade Construction
Machined from 6061-T651 aluminum for strength without unnecessary weight.

Mil-Spec Hard Coat Anodizing
Provides enhanced durability and resistance to wear and corrosion.

Includes Rail Covers
Comes with three KAC 11-Rib rail panels for improved grip and heat protection.

Low-Profile Gas Block Required
Optimized for modern AR-15 and SR-15 configurations.

Specifications

• Manufacturer: Knights Armament Company (KAC)
• Model: Free Float RAS MK12 Mod 1
• Length: 12 inches
• Material: 6061/T651 Aircraft-Grade Aluminum
• Finish: Mil-Spec Hard Coat Anodized
• Rail System: Quad Rail (MIL-STD M1913)
• Rail Positions: 12, 3, 6, and 9 o’clock
• Weight: 1 lb
• Compatibility: AR-15 / SR-15 platforms
• Gas System Compatibility: Carbine, Mid-Length, Rifle-Length
• Gas Block Requirement: Low-profile gas block required
• Mounting System: Proprietary barrel nut (installation required)
• Included Accessories: 3x KAC 11-Rib Rail Panels