The properly upgraded G19/23 Gen 4 Recoil Spring Assembly is the perfect way to make sure your pistol is properly fitted for the latest generation of Glock pistols. These Glock G19/23 Gen 4 Recoil Spring Assembly were simply built to be the perfect addition to the tool box of any shooting enthusiast. The recoil spring assembly is one of the simplest and most inexpensive ways to make sure your pistol shoots as well as it possibly can. Complete with everything you need, the Glock Gen 4 G19/23 Recoil Spring Assembly Kit is a simple way to transform your Glock handgun into a force to be reckoned with. Specifications for Glock G19/23 Gen 4 Recoil Spring Assembly: Manufacturer: Glock Gun Make: Glock Gun Model: Glock 23, Glock 19 Model Generation: 4 Package Contents: Glock G19/23 Gen 4 Recoil Spring Assembly This product is compatible with the following gun models: Glock 19, Glock 23