Glock 34 9mm 10 Shot Gen4 135mmGlock 34 9mm Pistol Gen4, 10 Shot, 135mm Barrel Key Features Competition optimised Gen4 full size frame with extended 135mm barrel Long sight radius for enhanced accuracy and target acquisition Dual recoil spring assembly for reduced felt recoil and improved reliability Interchangeable backstraps (S, M, L) for a customised grip fit Reversible, enlarged magazine catch for ambidextrous use Improved Gen4 trigger mechanism with integrated drop safety 10