Model GB-2S Steel Set Screw Type .750 Diameter Bore
With the various rail systems currently being offered for the AR15/M16/M4 weapon system, the Vltor Low-Profile Gas Block is small enough to fit inside most rail systems. These gas blocks are an excellent replacement for the archaic fixed sight tower gas block, which has been the standard since the early 1960's.
The Vltor Low-Profile Gas Block covers one-inch of the barrel's surface and is made to the tightest tolerance. These gas blocks are offered in two materials, 4140 carbon steel and 17-4PH stainless steel. The 4140 gas blocks are manganese phosphate (black finish) to match barrels with similar finish. The stainless steel gas blocks are blasted to give a matte gray finish.
