This gas block replaces your existing front sight to provide a simple, low profile design that can be used to mount a rifle length forearm to a carbine length barrel. It is mounted by the use of two set screws. This gas block is popular among those who wish to cover the unplated surface of their barrel after removing their old A-Frame front sight/gas block.
Fit: AR-15, LR-308
Finish: Matte Phosphate Black