Springfield Armory Echelon 4.0 C 9mm Luger 4in Black Melonite Pistol - 10+1 Rounds - Engineered for carry, the Echelon 4.0C retains the key features of the full-size model, with a shorter 4-inch 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 and provides a 10-round capacity, meeting the requirements for states with capacity restrictions. Compact Dimensions Central Operating Group: The Central Operating Group is self-contained and serialized, providing a robust housing for the patent pending system. 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. Includes: 2 Magazines: This variant of the 4.0C ships with two 10-round flush magazine for states with capacity restrictions.