BCM® rifles come stock with a rifle length gas system, as designed and fielded by the US Military in the original AR10 and M16A1-5 rifles. Optimized for 18-20" long barrels, this gas system reduces recoil impulse and delivers a smoother operating and more controllable weapon system.

Available in 11595E Mil-Spec (A4 and A5 models) or in precision SS410™ (SAM Rifle and MK12), every BCM stamped barrel is subjected to the Mil-Spec HPT (High Pressure Test) and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface, guaranteeing more accurate and durable weapon systems.