Engineered to merge full-size capacity with a compact slide assembly, the Echelon 4.0FC pairs a 4-inch barrel with a full-length grip. At its core is Springfield's Central Operating Group, providing a serialized foundation for modular performance. The revolutionary Variable Interface System enables direct-mount compatibility with a wide range of today's leading optics. Fully ambidextrous and equipped with tritium/luminescent U-Dot sights, the 4.0FC delivers duty-grade capacity with fast handling in a balanced, do-it-all platform.Caliber 9mmColor BlackBarrel 4" Hammer Forged Steel, Melonite Finish, 1:10Slide Billet Machined, Melonite Finish, Optics-ReadyFrame Black Polymer, Full-Size Grip Module w/ Compact Dust CoverSights Tritium / Luminescent Front, Tactical Rack U-Dot Rear, Viridian RFX11Recoil System CaptiveGrip Width 1.2"Magazines (4) 15-RoundWeight 24 ozLength 7.25"Height 5.5"