Just like the picture shows. Extreme rear end of extension to the gas block shoulder. Originally Posted by Yimmy So from gas port to extension?
Black River Tactical BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16" BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE BRT Bolt Carrier Groups M4A1, M16 CHROME BRT Covert Comps 5.56, 6X, 7.62
Forum Rules
Bookmarks