Glock 21 Gen 5 Mos, 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 Pa215s201mos