POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308. 308 caliber. 5/8-24 thread. Includes muzzle and collar jam nut. Specifications for POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308: Manufacturer: POF USA Color: Black Projectile Caliber: .308 Caliber Threads per Inch: 5/8x24 Gun Model: AR-10 Condition: New Package Contents: POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308 The POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308 is a quality addition to the POF USA lineup. For more great deals on Muzzle Brakes & Compensators by POF USA please browse our POF USA Gun Parts page. What firearm models does the manufacturer say POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308 is compatible with? The manufacturer says that POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black MBK308 is compatible with AR-10POF USA Three Chamber Muzzle Brake And Locknut Kit .308 Caliber Black