The Herrington Arms HC95V2 is designed to fit the contour of the Glock Gen 6 AND Gen 5 slides (Fins) AND our no fin version can fit Gen 4, 5, & 6 slides or some aftermarket Glock slides. This compensator is based off the designs of our old HC9XL and our HC95V1. They combined the efficient port geometry from the HC9XL and the esthetics of the HC95V1 to make the HC95V2 into what it is today. This is our most efficient Glock compensator when it comes to muzzle flip reduction. The HC95V2 will work with the stock springs provided your gun has gone through our recommended break in period of 500 rounds of factory new ammunition with the threaded barrel you intend to use with the firearm before installing a compensator. They've found that this compensator has a 34% muzzle flip reduction (8% more than the HC95V1) depending on what 9mm load and Glock model is used. Product Features Designed to work with most 1/2-28 threaded 9mm barrels. Made from USA-sourced 7075 aluminum. Designed, assembled, and machined in the USA. 3 port design to mitigate vertical and felt recoil Will fit in most open bottom holsters. We use Sierra Defense, Tier 1 Concealed, and Safariland. Works with all gen 5 and Gen 6 Glock 9mm models Product Specifications Material: 7075 Aluminum Finish: Black Anodized or FDE Cerakote Compatibility: Glock 17/19/26/45/34/19x/47 (including the MOS models of) with 1/2-28 Barrels and must be GEN 5 or GEN 6 Glocks Included: 5/64 Allen key - Steel replacement 8-32 set screw Length: 1.0" long NOT COMPATIBLE WITH SILENCERCO, BAR-STO, KKM, OR EFK BARRELS!