Engineered with superior ergonomics and built to withstand the harshest conditions the Echelon 4.5F sets a new standard for modern striker-fired duty pistols. With a host of patent pending features this modular pistol is designed around a robust stainless steel chassis housed in a full-size frame offering a 17-round flush capacity and 20 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 4.5 Hammer Forged Steel Melonite® Finish 1:10 – Slide Billet Machined Melonite® Finish Aimpoint® A-CUT® – Frame Black Polymer Medium Grip Module – Sights Black Serrated Front & Rear Aimpoint® COA® Red Dot – Recoil System Captive – Grip Width 1.2 – Magazines (1) 17-Round (1) 20-Round – Weight 24.6 oz w/ Flush Mag 25.3 oz w/ Extended Mag – Length 8 – Height 5.5 w/ Flush Mag 6.5 w/ Extended Mag