The Echelon from Springfield Armory is a modular and adaptable handgun designed around a stainless steel chassis and optics mounting system. Features the COG, entirely self-contained and serialized allowing it to be easily moved between grip modules in seconds; optic mounting system; Variable Interface System (VIS) allows users to mount over 30 optics directly to the slide without the use of adapter plates; the slide features four distinct engagement surfaces; a trench cut forward of the action gives shooters a natural index location for press checks and charging the firearm and the back of the slide is flared for positive purchase while deep forward and rear serrations are carried through the corners for a firm grip from any angle. Includes one 17rd magazine, one 20rd magazine and case.