Shadow Systems MR920 Elite Optic Ready with Threaded Barrel and a Herrington Arms HC9XL Compensator and Chrome Silicon 15 Lb Recoil Spring; Glock magazine compatable.  Comes with two 15 round magazines. This MR920 is basically a clone of an upgraded Glock 19. It is just broken in with fewer than 900 rounds. The cost new is $999.00.