Engineered for carry the Echelon 4.0C retains the key features of the full-size model with a shorter 4-inch barrel and compact frame offering a 15-round flush capacity and 18 rounds with the extended magazine. Factory equipped with the Aimpoint® A-CUT paired with the COA® closed-emitter red dot sight this integrated system mounts the optic directly to the slide without intermediary plates reducing tolerance stacking while delivering a lower more secure interface for enhanced durability and consistent zero retention. – Caliber 9mm – Color Black – Barrel 4 Hammer Forged Steel Melonite® Finish 1:10 – Slide Billet Machined Melonite® Finish Aimpoint® A-CUT® – Frame Black Polymer Small Grip Module – Sights Black Serrated Front & Rear Aimpoint® COA® Red Dot – Recoil System Captive – Grip Width 1.2 – Magazines (1) 15-Round (1) 18-Round Extended – Weight 23.9 oz w/ Flush Mag 24.3 oz w/ Extended Mag – Length 7.25 – Height 5.125 w/ Flush Mag 6.125 w/ Extended Mag