The KeyMo Muzzle Brake is your gateway to silence. When you re ready for peace and quiet use the KeyMo brake to quickly attach your Sandman Series or KeyMo equipped suppressor to your rifle. If you re not quite ready to turn up the silence, you can still employ the finest brake on the market and experience a flatter shooting rifle with minimal concussion compared to traditional muzzle brakes. The sealed taper design is forward of the Keymo locking channels, allowing the suppressor to be easily removed without carbon-locking onto the mount. NOTE: The DA102 comes with a pre-drilled hole for pin & weld at the 6 O clock position. Product Specifications Finish: Black Nitride Material: 4140 HT Alloy Steel Threads: 1/2-28, 5/8-24, 3/4-24, M18-1, M18-1.5 AI Weight: 3.90 oz. Overall Length: 2.82? Bore Diameters: 5/8-24: .30 caliber Patent No.: 11441867 Compatible Silencer(s): KeyMo equipped silencers Sandman series Nomad series with KeyMo adapter Nomad Ti series with KeyMo adapter Primal with KeyMo adapter Sierra 5 with KeyMo adapter Wolverine with HUB adapter