Springfield Armory Echelon 9mm Luger 4.5in Melonite Pistol - 10+1 Rounds - The Echelon from Springfield Armory sets a new standard for modern, striker-fired duty pistols. With a host of patent pending features, this modular and highly adaptable handgun is designed around a robust stainless steel chassis and revolutionary optics mounting system. Engineered with superior ergonomics and built to withstand the harshest conditions, the Echelon takes its rightful place at the front of the pack. The Echelon from Springfield Armory - Unparalleled. Barrel: 4.5in, Hammer Forged Steel, Melonite Finish, 1: 10 Twist Slide: Billet Machined, Melonite Finish Optic Ready: The Variable Interface System (VIS) allows users to mount over 30 optics directly to the slide without the use of adapter plates. Simply configure the self-locking pins for the footprint of your desired optic to achieve a low, direct mount for improved sight picture and intuitive alignment. Accessory Rail Ships with three backstraps - each with an integrated armorers tool. Front Serration At the heart of the Echelon lies the all-new Central Operating Group (COG). Employing cutting edge manufacturing techniques, the COG is entirely self-contained and serialized allowing it to be easily moved between grip modules in seconds. Recoil System: Captive Includes Two 10-Round Magazines This model includes an OD green grip module