Low-profile Adjustable .750 diameter gas block, set screw style, black nitride coated.
Our AR-chitect AR15 FOUNDATION SERIES gas blocks are designed to be slim and
American made from American sourced 4140 pre-heat treated steel.
.750 diameter set screw style. If your barrel is not pre-dimpled, we recommend the use of a gas block alignment tool.
We recommend the use of lok-tite thread locker on both set screws during installation.
4140 gas blocks are black nitride coated not phosphate coated for the best look and finish.
100% warranty against any and all manufacturers defects. If we missed something we will replace it at
no cost to you.