The Springfield Armory Echelon 4.5F Comp integrates premium, flatter-shooting recoil management directly into Springfield's premier full-sized duty platform. Chambered in 9mm Luger, this striker-fired pistol features a 4.5-inch cold hammer-forged steel barrel and a slide with a rugged black Melonite finish. Its standout feature is a single, top-ported expansion chamber built directly into both the barrel and slide assembly to route burning gases upward, noticeably taming muzzle flip for near-instant target re-acquisition. Operating on the modular, serialized Central Operating Group (COG) chassis system, this model features the plate-free Variable Interface System (VIS) for direct, ultra-low red dot optic mounting. Outfitted with tactical tritium U-Dot night sights and fully ambidextrous operational controls, it ships standard with high-capacity options: one 17-round flush magazine and one 20-round extended magazine.