Centurion Arms AR-15 Low Profile Tabbed Gas Block features a portrusion behind the gas port at 12 o'clock to interface with Centurion's Arms' barrels, which are relieved for this tab. This interface prevents rotation that would otherwise require the user/gunsmith to crosspin the gas block through the barrel.
.625", .750" and our .750" tabbed for all current Centurion Arms barrels with the gas block alignment notch!
Carbon Steel Matte Black
|Shipping Restriction||ITAR/Export Restricted|
|Barrel Journal||0.750 Inch|