TROY Industries Gas Block, .875", Black SGAS-875-00BT-00

Troy’s .875 Low Profile Gas Block is made specifically for bull barrel rifles that have a 0.875 gas block seat and Armalite® .308 heavy barrel and other calibers. Machined from 4140 pre-hardened steel finished with MIL-STD Manganese Phosphate. Gas tube roll pin not included.