The barrel nut will fit over all mil-spec diameter barrels (max of 1")īravo Company MFG, Inc. Hard Coat Anodized per Mil-A-8625F, Type III, Class 2ĭesigned to be used with Mil-Spec M16 rifle length gas systems with FSB or low profile gas block, or mid length and carbine gas systems with a low profile gas block.Monolithic Top Rail Provides No Gap Between Rail System and A3 Flattop Receiver. Rainier Arms specializes in high-end AR15 parts, AR15 accessories, AR15 grips, AR15 stocks, AR15 uppers, AR15 lowers, AR15 barrels and much more. The billet-ar upper receiver set is 100 machined in the usa and was engineered from the ground up to address structural design weaknesses in standard usgi receivers and enhance overall tolerances.It has a precise bolt raceway for smoother chambering, more rigid receiver walls to reduce firing flex. Steel Barrel Nut (same KMR, MCMR, and QRF series), to resist movement under heat. 7 Quad rail FDE Features: T6 6061 Aluminum. Includes 4 QD Sing Swivel Sockets, (limited rotation).Proprietary engineered profile offers additional cross sectional strength.Precision Machined Aerospace 6061-T6 Aluminum Alloy, for high strength and lightweight.Free Float Quad Rail eliminates loads from barrel, reducing the deflection for more accurate shooting. This proprietary patented mounting system (US Patent 8904691), includes a mechanical index to the 12:00 rail and positions mounting hardware to mitigate the movement caused by heat generated by the weapon system. ***COSMETIC BLEM*** (Scratches or scuffs)īCM® QRF-12 (Quad Rail Free Float Handguard)įeaturing the same industry leading barrel nut and lock up design as originally introduced on BCM's evolutionary KMR handguard, the QRF Series of handguards gives the shooter modularity in the picatinny (MIL-STD-1913) platform.
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