The Springfield Armory Echelon is Springfield's most advanced full-size pistol, featuring a Variable Interface System (VIS) on the frame that accepts interchangeable grip modules, a CMC (Central Mass Centralized) operating system for low bore axis, factory optics-ready cross-slot system accepting multiple footprints, and a flat-faced trigger with a short tactile reset. The 20-round flush magazine capacity gives it one of the highest factory capacities in the class. The 4-inch model is the standard duty/carry variant. Type: Pistol Action: Striker-Fired Caliber: 9mm Capacity: 20 Year introduced: 2023, USA Weight: 22 oz Overall length: 7.4" Status: Active Intended use: duty, carry, competition