a2-front-sight-gas-block-with-bayonet-lug-assembly-for-ar15
a2-front-sight-gas-block-with-bayonet-lug-assembly-for-ar15, Material : Aluminum Alloy, Metal Construction.Suitable for M Series rifle.Standard A2 Front Sight Gas Block.Triangle A2 height front sight post 1.98" with Sling Loop.Designed for barrels with .750" diameter gas journals.