The HC9XL 3.0 compensator has been designed to work well with Glock models 19, 17, 45, 34 and 26 as long as they are gen 4 or 5. It will fit all 1/2-28 barrels. The 3.0 has been carefully constructed, keeping in mind end-user feedback. It was created to ensure that it's the best Glock compensator in the market, and it incorporates all the elements required by professional and recreational shooters alike. Apart from the above, it boasts of the same legendary reliability as its 2.0 counterpart. I.e., it is one hundred percent reliable with OEM stock springs, and it will smoothly run 115gr, 124gr, and even 147gr +P ammo. This means that there is no need to tinker with the insides of your everyday carry weapon. Since the 3.0 is only 1/16th longer than the HC9C, you won't have any trouble carrying it everywhere. However, it's the way it works that allows the 3.0 to really shine. It reduces felt recoil and muzzle flip by as much as 40 percent. Moreover, its side porting cuts down the horizontal arch very effectively, which makes for a rock-steady grip. This compensator will turn your Glock into an amazingly accurate tack driver of a weapon. It will also make it much easier to land faster and more accurate follow-up shots. Once mated to the Glocks natural low bore axis, this compensator can almost completely eliminate the recoil and flinch factors. This holds particularly true for even a subcompact pistol like the Glock 26 since it is traditionally more difficult to control with full-power +P 9mm loads. It will also help you shoot much tighter groups at longer ranges. You won't have to waste time realigning your sights after every shot since your gun won't jump around every time you squeeze the trigger. Specifications for Herrington Arms HC9Xl 3.0 Pistol Compensator For Glock 19/17/26: Manufacturer: Herrington Arms Cartridge: 9mm Luger Finish: Aluminum Fabric/Material: 6061 Aluminum Threads per Inch: 1/2x28 Gun Make: Glock Gun Model: Glock 17, Glock 26, Glock 19 Features of Herrington Arms HC9Xl 3.0 Pistol Compensator For Glock 19/17/26 Up to 40 percent vertical recoil reduction Horizontal stabilization that makes it easy to shoot rapidly and accurately The 3.0 compensator has easily passed the 4000-round durability test benchmark It has been precision engineered from very high quality and lightweight CNC machined 7075 aluminum for extra durability One of the most practical upgrades for your EDC weapon It can be installed easily. No need to take your Glock to a gunsmith DOES NOT WORK WITH KKM OR BARSTO BARRELS! REQUIRES A THREADED BARREL Package Contents: Herrington Arms HC9Xl 3.0 Pistol Compensator For Glock 19/17/26