2A Armament .875 Internal Bore Gas Block 4140 Steel, Black - 2A-STGB-3

All the same great styling of 2A's popular titanium gas blocks but in black oxide finished steel. The low profile design works well under hand guards, and anywhere else that space is at a premium. A basic two set screw design ensures a secure fit, and an easy installation. Blue locking compound is recommended.Features:Blasted and black phosphate coatedLow profile design4140 steel