The Springfield Armory Echelon is Springfield's flagship modular striker-fired service pistol, built around a Variable Interface System (VIS) that allows the optics mounting plate to be swapped without removing the rear sight, accepting over 40 different optic footprints natively. 20+1 capacity, 4-inch barrel, and a proprietary Central Operating Group (COG) fire control unit that can be transferred between frames like the SIG P320's FCU. Type: Semi-Auto Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 20 Year introduced: 2023, Croatia/USA Weight: 25.7 oz Overall length: 7.25" Status: Active Intended use: duty_carry, service, competition