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(TM) 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. Specifications and Features: Caliber: 9mm Color: Black Barrel: 4" Hammer Forged Steel, Melonite Finish, 1:10 Slide: Billet Machined, Melonite Finish, Optics-Ready Frame: Black Polymer, Full-Size Grip Module w/ Compact Dust Cover Sights: White-Dot Front, Tactical Rack U-Dot(TM) Rear, Viridian RFX11 Recoil System: Captive Grip Width: 1.2" Magazines: (4) 17-Round Weight: 24 oz w/ Flush Mag, 25 oz w/ Extended Mag Length: 7.25" Height: 5.5" w/ Flush Mag, 6.5" w/ Extended Mag