Springfield Armory Echelon 4.0C Comp 9mm Luger 4in Black Melonite Pistol - 18+1 Rounds - Engineered for carry, the Echelon 4.0C Comp retains the key features of the full-size model, with a shorter 4in barrel and compact frame for enhanced concealability. The integral compensated slide assembly hosts a single port that redirects gas upward to reduce muzzle rise and improve control. 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. Compact Dimensions: Shortened at the frame and muzzle, the Echelon 4.0C Comp boasts full-size features in a concealable package Central Operating Group: The Central Operating Group is self-contained and serialized, providing a robust housing for the patent pending operating system (2) Magzines Integral Compensator: The integral compensator featured on the Echelon 4.0C Comp is discreetly designed with a single port on the top of the hammer-forged slide and barrel. Redirecting gas upwards, it effectively reduces muzzle rise and enhances control. The result is a pistol that delivers faster and more accurate follow-up shots. In addition, the front sight is positioned behind the compensator for an uninterrupted sight picture.