Description Tank style brake threaded M18 x 1.5mm for the 8.6 Blackout (.338 diameter bullets or smaller). Choose black or stainless finish. Three slots on each side. Six small ports in the top. No ports on the bottom. Install with crush washer or shims – not included. This is our most effective brake for reducing recoil. Note: Use a 5/16″ round rod inserted through the ports (side to side) in order to tighten the brake. DO NOT use the flats on the brake to tighten it. 5.4oz 2.58″ Long 1.30″ Wide 1.06″ High Crush washer sold separately.
