Springfield Armory Echelon 4.0 Compact 9mm Luger 4in Black Melonite Pistol - 15+1 Rounds - Engineered for carry, the Echelon 4.0C retains the key features of the full-size model, with a shorter 4in 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 and provides a 15 Round capacity, meeting the requirements for states with capacity restrictions. Compact Dimensions: Shortened at the frame and muzzle, the Echelon 4.0C boasts full-size features in a concealable package. Central perating Group: The Central Operating Group is self-contained and serialized, providing a robust housing for the patent pending system. (2) Magazines included: This variant of the 4.0C ships with two 15-round flush magazine for states with capacity restrictions.