The tactical solutions pac-lite compensator are designed to compliment tacsol pac-lite barrel upgrades for the ruger mark i ii or iii ruger 22/45 ruger mark iv or mark iv 22/45 and other 1" barrels.The pac-lite compensators feature 360 degree ports to help reduce muzzle rise while maintaining a clean look that matches the contour of any 1" target barrel.The compensators thread on to 1/2" x 28 threaded-end barrels.Finish: BlackType: CompensatorModel: Pac-LiteDimensions: 1" LSize: 1"Material: 6061-T6 AluminumThread Pattern: 1/2"-28 tpi