Check the listing for details. Kaw Valley Precision .40 S&W Linear Comp 9/16x24. Condition: New. Listed at 47.95 USD. Linear Comp Specs: Thread: 9/16" x 24 OAL: 2 1/8" OD: .95 Inches Caliber: .40 S&W (given proper barrel threading) Weight: 2.9oz Heat Treatment: Melonite QPQ Surface Finish: QPQ Black Design Features: Wrench Flats: 3/4" wrench flat for easy installation Radial Fluting: 8 weight reducing flutes KVP Linear Compensators are a muzzle device designed to collect and direct all the muzzle gases forward, away from the shooter. Unlike other types of muzzle devices, KVP linear comps actually lower the decibel the shooter experiences while shooting the rifle. This lowered perceived decibel is especially noticeable in shorter barreled rifles while shooting high power rounds. Kaw Valley Precision Compensators can also aid in the cycling with the increased back pressure provided by the comp. KVP Products are proudly designed and made here in Kansas!