The original Echelon set the benchmark for service-weapon performance. The Springfield Armory Echelon 4.0FC Semi-Auto Pistol with Aimpoint COA merges full-size capacity with a compact slide assembly, giving you more capacity in an easily concealable package. Like the original, it's built around the Central Operating Group that can be easily moved between grip modules in seconds and features the A-CUT slide cut to accommodate the included Aimpoint COA without the use of an adapter plate. The cold hammer-forged, Melonite-coated barrel shaves half an inch off the original's length, but still puts your shots right where you want them. This model comes with an Aimpoint COA closed-emitter optic mounted directly to the slide. Includes 2 magazines. Pairs a full-sized frame with compact slide A-CUT slide optics cut accommodates the Aimpoint COA with no adapter plates Central Operating Group allows for changes in grip module, etc. Cold hammer-forged, Melonite-coated barrel Ambidextrous controls Billet machined slide with Melonite finish Factory-mounted Aimpoint COA closed-emitter optic