This gas block replaces your existing front sight and provides a Picatinny rail on the same plane as your flat-top AR receiver. It clamps to the barrel using 3 Allen screws. This gas block has a bore diameter of .936 inches for bull barrels. Gas port size:
This gas block replaces your existing front sight and provides a Picatinny rail on the same plane as your flat-top AR receiver. It clamps to the barrel using 3 Allen screws. This gas block has a bore diameter of .936 inches for bull barrels. Gas port size: 0.125″.
@25
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