JMac Customs 2C 5/8-24 X37 .45 cal 2-Port Muzzle Brake with Bravo Suppressor Mount Black. Do NOT shoot without checking alignment with bore rods. JMac Customs is not responsible for any damage to the suppressor or any injury resulting from improper installation. Some firearms are NOT suitable suppressor hosts just because you can thread this muzzle device on does NOT mean it is safe to use. If you only want to use the 2C X37 with the BDS-37 Blast Diversion Shield you can install it using a crush washer. The X series muzzle brakes combine our effective RRD muzzle brakes and a direct thread mount for several popular suppressors as well as our BDS-37 blast shield This allows you to leave the muzzle device installed and simply thread the suppressor over Reduces weight length and cost compared to QD systems. Direct thread is also the preferred mounting method for accuracy The X37 has 1.375-24 threads on the outside and is available in multiple barrel thread pitches. Specifications for JMac Customs 2C 5/8-24 X37 .45 Cal Muzzle Brake w/ Bravo Suppressor Mount: Manufacturer: JMac Customs Color: Black Finish: Nitride Fabric/Material: 17-4PH Stainless Steel Threads per Inch: 5/8x24 Gun Make: Kalashnikov USA AR Platform Israel Weapon Industries (IWI) Grand Power Century Arms CZ Heckler & Koch Ruger Features of JMac Customs 2C 5/8-24 X37 .45 Cal Muzzle Brake w/ Bravo Suppressor Mount 2 Port Muzzle Brake with Bravo Suppressor Mount Package Contents: JMac Customs 2C 5/8-24 X37 .45 Cal Muzzle Brake w/ Bravo Suppressor Mount JMac Customs RRD-2C-30S-X37-45: 2C 5/8-24 X37 .45 cal 2-Port Muzzle Brake with Bravo Suppressor Mount Black