The Bottle Rocket is an enhanced brake for use with Q's Cherry Bomb muzzle brake. On top of that, it also serves as a sexy-ass thread protector for your Cherry Bomb when not hosting a silencer. As you've come to expect, the Bottle Rocket features Q's taper for proper alignment, and installs with an off the shelf 1/2 inch socket. Specifications: WEIGHT: 2.6 oz. OVERALL LENGTH: 2.7" Note: Not compatible with 9MM