AIM Sports Inc .30 Cal A2 Style Muzzle Brake Black Small. These Muzzle Brakes & Compensators by AIM Sports Inc are designed with top and bottom locking slots to help muzzle control and reduce dust signatures making them California featureless. However the closer the slots are to the front the more recoil you'll feel and thus the more likely you are to unload your gun. If you're seeking a compensator that works with .223/5.56 threaded barrels this muzzle brake isn't as effective as it is with .30 cal threaded barrels. However this muzzle brake is still highly effective providing increased muzzle control and reducing your dust signature to accommodate for California 's featureless gun laws. What's more this device greatly reduces recoil allowing you to shoot more accurate shots with a lighter body. Boost your weapon's performance and make it more comfortable to fire by installing this AIM Sports Inc .30 Cal A2 Style Muzzle Brake. Specifications for AIM Sports Inc .30 Cal A2 Style Muzzle Brake: Manufacturer: AIM Sports Inc Color: Black Threads per Inch: 5/8x24 Length: 1.75 in Weight: 2.3 oz Condition: New Features of AIM Sports Inc .30 Cal A2 Style Muzzle Brake Increases muzzle control Reduces dust signature Closed front design reduces recoil 5/8" x 24 threads Compatible with .30 CAL barrels Package Contents: AIM Sports Inc .30 Cal A2 Style Muzzle Brake AIM Sports Inc PJ008T: .30 Cal A2 Style Muzzle Brake Black Small