Tactical Precision Manufacturing TPM CVA Paramount ST/Side Ported Brake Grey 3/4x24. This muzzle device drastically reduces felt recoil and the side porting reduces blackpowder cloud formation post shot allowing for a clearer sight picture. Specifications for Tactical Precision Manufacturing TPM CVA Paramount ST/Side Ported Brake: Manufacturer: Tactical Precision Manufacturing Threads per Inch: 3/4x24 Package Contents: Tactical Precision Manufacturing TPM CVA Paramount ST/Side Ported Brake Tactical Precision Manufacturing MBR-CVA-GREY: TPM CVA Paramount ST/Side Ported Brake Grey 3/4x24