2.6&';&'; Minimal concussion The KeyMo Muzzle Brake is your gateway to silence. When you&';re ready for peace and quiet use the KeyMo brake to quickly attach your Sandman Series or KeyMo equipped suppressor to your rifle. If you&';re not quite ready to turn up the silence, you can still employ the finest brake on the market and experience a flatter shooting rifle with minimal concussion compared to traditional muzzle brakes. When it comes to removal, the suppressor can be easily removed without carbon-locking onto the mount. 3/4-24, M18-1, & M18-1.5 do not come with timing shimstable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }