Glock's Gen4 series of semiautomatic pistols incorporates all the features and benefits Glock is famous for, along with upgrades to enhance performance and shootability. This series still boasts nearly indestructible polymer frames that are stronger than steel. Tenifer coating on slides and barrels makes them as impervious to the elements as their predecessors. And Safe-Action-Pistol integrated safety features are still standard. Upgrades include Rough-Textured Frames (RTF) to make them even easier to handle in extreme conditions. RTF improves Glock's all-weather performance when shooting with or without gloves. Each Gen4 includes three interchangeable backstraps, so shooters can adjust the grips for a custom fit. Magazine-release buttons are larger and reversible to make them easier to operate for both right- and left-handed shooters. Dual recoil spring assemblies increase durability and reduce recoil and muzzle flip.