Adjustable gas block reduces gas flow to ensure reliable function during single-shot operation and when using sound suppression devices. Helps reduce felt recoil and minimize carbon buildup inside the receiver for less frequent cleaning without compromising reliability. Three-position selector drum adjusts easily with the included wrench. Suppressed position reduces back pressure to safe levels when using noise-limiting devices. Unsuppressed position allows normal weapon operation. Off position enables single-shot operation, preventing spent cartridge ejection and reducing muzzle concussion. Replaces factory gas block and tube; clamps securely around the barrel with two steel Allen head screws. Gunsmith installation recommended.
SPECS:
17-4 stainless steel, nitride finish, matte black. Fits AR-15/M16 chambered in 5.56mm with .750" O.D. barrel at gas port. Requires free-floated barrel and handguard that does not cover the gas block; will not fit under standard plastic or railed handguards. Gas tube included. Models available for the following barrel/gas system lengths: 10.5" Carbine, 14½"-16" Carbine, 14½" Mid-Length, and 18" Rifle.
Catalog page 12