Engineered for carry and finished in durable OD Green CerakoteA(R), the Echelon(TM) 4.0C retains the key features of the full-size model, with a shorter 4-inch barrel and compact frame for enhanced concealability. Its revolutionary Variable Interface System provides unmatched direct-mount compatibility with today's leading red dot sights, complemented by tritium U-Dot irons for fast target acquisition. The serialized Central Operating Group is housed in a compact frame, offering a 15-round capacity with the flush magazine and 18 rounds with the extended magazine. Specifications and Features: Caliber: 9mm Color: OD Green Barrel: 4" Hammer Forged Steel, MeloniteA(R) Finish, 1:10 Slide: Billet Machined, OD Green CerakoteA(R) Finish, Optics-Ready Frame: OD Green Polymer, Small Grip Module Sights: Tritium / Luminescent Front, Tactical Rack U-Dot(TM) Rear Recoil System: Captive Grip Width: 1.2" Magazines: (1) 15-Round, (1) 18-Round Weight: 24 oz w/ Flush Mag, 25 oz w/ Extended Mag Length: 7.25" Height: 5.125" w/ Flush Mag, 6.125" w/ Extended Mag