Check the listing for details. Kaw Valley Precision MACH 3 Modular Linear Comp KVP Compensator Body w/ End Cap. Color: Black, Condition: New. Listed at 38.95 USD. *This kit does not come with a thread adapter to attach to the barrel end. You must have a KVP MACH Linear Comp thread adapter to install on a barrel The KVP MACH Modular Linear Comp is a Patent Pending linear compensator system that is completely user configurable! If you've struggled to find a comp the correct length for the perfect "tuck," configure your own! KVP has opened up a level of modularity that has never before been offered in the Linear Comp market. The Mach Comps allow end users to run any length comp they want. Each component is machined from 6061-T651 Aluminum and hard coat anodized for wear protection. The MACH system utilizes a 1-1/4" hexagonal wrench flat configuration for easy installation with a standard open end or adjustable wrench.For permanent configurations of a MACH Modular Linear Comp, Red Locktite (or similar) thread locker should be considered. If future re-configure of the comp is desired, anti-seize on the mating threads is recommended. Compatible with pistol calibers up to .45 ACPCompatible with KVP MACH Linear Comp thread adapter Mach 3 Kit Includes:1x 1" Coupler2x 1" Spacers1x Standard End CapSpecs:Material: 6061-T651 ALCoating: Black Hard Coat AnodizedOutside Diameter: 1.280"Spacer ID/OD Thread: 1-1/8X28 TPIOver all Length: 3.350"OD: 1.280"Weight: 1.9oz