SPRINGFIELD ARMORY ECHELON(TM) 4.0C 9MM LUGER SEMI-AUTO HANDGUN W/AIMPOINT COA RED DOT Engineered for carry, 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. FEATURES COMPACT DIMENSIONS: Shortened Mfg: Springfield Armory