Lockhart Tactical Ultra Low Profile Adjustable Gas Block 0.750"Fits: Raven (556)Works on any AR-15/M16 barrels with 0.750" gas journalMade from 316 Stainless Steel, Our ultra low profile adjustable ga

LTAC AR15 Gas Tube - Carbine Length 9 3/4" (9.75")Fits: Standard AR-15/M16 gas blocks (regardless of barrel diameter) AR-15/M16 Barrels regardless of caliber Standard upper receivers Mil spec ga

LTAC AR15 Gas Tube - Rifle Length 15 1/8" (15.125")Fits: Standard AR-15/M16 gas blocks (regardless of barrel diameter) AR-15/M16 Barrels regardless of caliber Standard upper receivers Mil spec g

LTAC AR15 Gas Tube - Mid Length 11 3/4" (11.75")Fits: Standard AR-15/M16 gas blocks (regardless of barrel diameter) AR-15/M16 Barrels regardless of caliber Standard upper receivers Mil spec gas

LTAC AR15 Gas Tube - Pistol Length 6 3/4" (11.75")Fits: Standard AR-15/M16 gas blocks (regardless of barrel diameter) AR-15/M16 Barrels regardless of caliber Standard upper receivers Mil spec ga

LTAC Ultra Low Profile Adjustable Gas Block 0.750" - Rebuild Kit Only Ensure you select the correct kit. The adjustment screw is different depending on if you have a Gen 1 or Gen 2 gas block. You can