Check the listing for details. Kaw Valley Precision Linear Comp for 40S&W/45ACP/10MM - .578x28 Thread. Color: Black, Condition: New. Listed at 44.95 USD. Kaw Valley Precision 40S&W/45ACP/10MM Linear Compensators are currently available in a Black Oxide finish. Linear Comp Specs: Thread: .578" x 28 OAL: 2 1/8" OD: .95 Inches Caliber: 40S&W/45ACP/10MM Carbines and Pistols Weight: 2.6oz Heat Treatment: Ferritic Nitrocarburization Surface Hardness: Approximately 60 Rockwell Surface Finish: Black Oxide 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 that traditional Muzzle Devices do not provide. KVP Products are proudly designed and made here in Kansas!