The Springfield Armory Echelon 4.0C OD Green packs the modular engineering and duty-ready performance of the Echelon line into a concealable, compact framework. Chambered in 9mm Luger, this striker-fired pistol features a 4-inch cold hammer-forged steel barrel and a rugged Olive Drab Green Cerakote finish across its billet-machined slide. Built around the self-contained, serialized Central Operating Group (COG) chassis, the internal fire control unit can easily swap into different grip modules. The optics-ready slide utilizes the innovative plate-free Variable Interface System (VIS) to directly mount over 30 popular micro red dots at a deeply recessed, low profile. Outfitted with fully ambidextrous operational controls and premium tritium U-Dot night sights, it ships with one 15-round flush-fit magazine and one 18-round extended magazine.