Introduced in 2010, nearly two decades after the release of the original Glock 17, the G17 Gen 4 features an upgraded recoil spring assembly and improved ergonomics. The rough-textured frame and checkered grip offer a positive hold. The grip size of the G17 Gen 4 is slightly smaller than its predecessor, the G17 Gen 3, although the modular back strap system allows for instant customization and fit for different hand sizes. The enlarged magazine catch of the G17 Gen 4 can quickly and easily be changed to accommodate right- or left-handed users, while a built-in accessory rail makes for easy customizations. "/\