GLOCK 21 Gen 5 M.O.S., Striker Fired, Semi-automatic, Polymer Frame Pistol, Full Size, 45ACP, 4.61" Barrel, nDLC Finish, Black, Fixed Sights, Optics Ready, 10 Rounds, 3 Magazines, Comes with Glock OEM Adapter Plate 06 for Trijicon RMR Footprint UA215S201MOS • Safe Action • Capacity: 10+1 • Finish: Black Matte • Sights: FT: White Dot RR: White Outline • Barrel length: 4.61 • Overall length: 7.59 • Includes One Adapter PlateFront Slide Serrations Flared Mag-Well Modular Optics System • Safe Action • Capacity: 10 + 1 • Finish: Gas Nitride • Sights: Fixed Glock Sights • Barrel length: 4.61" • Overall length: 8.03" • 15in Free-Float MLOK Rail/ Ambi Bolt Release