JMac Customs 4C 1/2-28 Slim 9mm 4-Port Muzzle Brake Black Nitride Black

JMac Customs 4C 1/2-28 Slim 9mm 4-Port Muzzle Brake Black Nitride Black. This RRD-4C-S was designed specifically with the NAK-9 pistol in mind. Unlike our other 1/2-28 threaded RRD-4C devices this device will install on your NAK-9 (or similar) and index using the muzzle device detent pin in your front sight block. Specifications for JMac Customs 4C 1/2-28 Slim 9mm 4-Port Muzzle Brake: Manufacturer: JMac Customs Color: Black Finish: Nitride Fabric/Material: 17-4PH Stainless Steel Threads per Inch