The Zev V2 Pro Compensator enhances the performance of your Glock. This comp improves on the original design of the Pro Compensator and has a secure install and removal without the need for any thread lockers. This compensator was designed to be used on a Glock 19 and will make the slide the same length as a 34. While it was designed for a 19 this guide rod will fit and function on all glock 9mm models except the 43, 43x, and 48. The V2 compensator will generally work with oem recoil spirngs but in some instance will need a lighter recoil spring.