Gas Blocks

Troys .875 Low Profile Gas Block is made specifically for bull barrel rifles that have a 0.875 gas block seat and Armalite 0.308 heavy barrel and other calibers. Machined from 4140 pre-hardened steel finished with MIL-STD Manganese Phosphate.br /br /- ...

Troy .936 low profile gas block is made specifically for bull barrel rifles that have a greater diameter than the standard m4/m16 .750 barrels. The Troy .936 low profile gas block works on both .223, 5.56 and .308 bull barrels (As well as other calibers)...