The Centurion Arms Rifle Length Free Float RAS (Rail Adapter System) is a precision-engineered component designed to enhance the functionality, versatility, and accuracy of the AR-10-styled rifles. This advanced handguard system is equipped with full-length mil-spec M1913 Picatinny rails located at the 12, 3, 6, and 9 o’clock positions along the handguard’s exterior. These Picatinny rails conform to military specifications and are designed to provide robust, secure mounting platforms for a wide array of tactical accessories. Whether you're attaching vertical grips, bipods, weapon lights, laser aiming modules, sling mounts, or optical sights, this RAS system offers the adaptability needed to configure your rifle for virtually any mission-specific application.
A key performance feature of this system is its free-floating design. Unlike traditional drop-in handguards that may make contact with the barrel, the Centurion Arms Free Float RAS does not touch the barrel at any point. This free-float configuration preserves the natural harmonic vibrations of the barrel during firing, which results in more consistent shot placement and overall improved accuracy, particularly during rapid or sustained fire. This benefit is especially valuable to marksmen and tactical operators who demand repeatable precision in a variety of field conditions.
Included in the package are essential components required for installation, such as a proprietary barrel nut, three precision alignment pins, and a specialized rail nut. These parts are designed to ensure secure attachment, proper indexing, and long-term durability under demanding operational use.
Rifle Requirements:
In order to install and utilize the Centurion Arms Rifle Length Free Float RAS correctly, the host rifle must be equipped with a rifle-length gas system. This refers to the distance from the chamber to the gas port, which should be approximately 12 inches. However, the system can also be adapted for use with shorter gas systems—such as mid-length or carbine-length—provided that a low-profile gas block is employed to accommodate clearance within the rail. It is important to note that installation of this free-float handguard is not a drop-in procedure. It will require full disassembly of the rifle’s existing gas system, as well as the complete removal of the factory-installed barrel nut. Proper tools, mechanical aptitude, or assistance from a qualified gunsmith are strongly recommended to ensure safe and secure installation of the rail system.
This handguard uses a proprietary barrel nut that may be installed using a standard AR-10 armorer’s barrel nut wrench (not included). Installation will also require a strap wrench for the rail nut (also not included).
Specs:
Click Here for Installation Instructions
Suggested Tools:
DPMS / KAC 308 Barrel Nut Torq Wrench
Standard Strap Wrench
