Zev Technologies Stainless Steel Slides were designed with tighter tolerances to increase accuracy and performance. There is a choice of 3 different sight configurations as well as and variety of coatings for a more custom look. These are the best aftermarket slides available for Glock. - Easy to install and Machined from Billet Stainless Steel then coated these slides are a great addition to anyone's Glock collection. - Machined from 17-4 Billet Stainless Steel to have tighter tolerances than a factory slide. - DLC or PVD coatings offered have a Rockwell hardness rating above that of factory coatings. ZEV Products always incorporate design feel and performance at the same time. - Model and Generation specific configurations. - Slide cut - DRAGONFLY - The Dragonfly is one of ZEV