The CQB Compensator is designed to redirect sound forward whereas others redirect to the side. Designed for close quarters combat, specifically law enforcement and military units shooting indoors and at close range, this compensator is gaining popularity for use on short barreled rifles to mitigate sound and blast, while improving overall weapon control. Caliber: .30 Caliber Thread Pitch: 5/8x24 Length: 2.5" Diameter: .1.375" Weight: 7.6 oz. Mfg: Primary Weapons