With the G17 Gen5 MOS GLOCK enhances the already near-perfect Gen5 model of "The original" with the addition of the Modular Optic System (MOS). The slide is precision machined to provide a mounting system for popular optic sights. With multiple adapter plates, you can quickly and easily mount miniature red dot sights to the rear of the Gen5 GLOCK slide, which has front serrations for easier and quicker manipulations.All of the Gen5 qualities are present in this standard-size pistol: The latest GLOCK nDLC surface finish on the major metal components, unmatched in hardness and rust resistance; the high traction Gen5 frame texture, quickly reversible magazine catch, ambidextrous slide stop lever, the GLOCK Modular Backstrap System (MBS) for individual operator adjustability, the universally-acclaimed GLOCK Safe Action® System and high visibility orange magazine followers.____________________SPECIFICATIONS:Caliber: 9x19mmSystem: Safe Action®Mag. Capacity: Standard: 17; Optional: 19 / 24 / 31 / 33Barrel Length: 114 mm | 4.49 inchWeight without magazine: 625 g | 22.05 ozWeight with empty magazine: 705 g | 24.87 ozWeight with loaded magazine: 945 g | 33.33 ozTrigger Pull: 26N____________________FEATURES:Modular optic system – MOSThreaded barrel with 13,5x1L thread & thread coverFront serrations (FS)nDLC finishAmbidextrous slide stop leverGLOCK Marksman barrelFlared magwell for speedloadingVersatility by removal of the finger groovesSafe Action® SystemEnlarged floor plateSafety advantage through orange followerMagazine capacityCustomizable frame sizeGen4 RTF – Rough textured frameReversible magazine catchMounting railPolymer frameLoaded chamber indicator