The Springfield Armory Echelon 4.5F Comp Semi-Auto Pistol with Gear Pac redefines what a striker-fired duty handgun can be, offering robust capacity, easy optics attachment, and superior modularity. It's built around the Central Operating Group an incredibly rigid, serialized, self-contained unit that contains the action. The Central Operating Group can be easily moved between grip modules in seconds, allowing for a wide range of customization options. The full-sized Echelon also features Springfield's Variable Interface System for easy attachment of over 30 red dots without the need for an adapter plate. The slide itself features 4 different engagement surfaces including deep serrations and a flared rear that make it easy to operate in the heat of combat. The cold hammer-forged, Melonite-coated barrel and slide feature an integral compensator that provides excellent recoil control. Oversized trigger guard for use with gloves. Fully ambidextrous controls come standard. This Gear Pac model comes with a Viridian RFX11 Green Dot Optic, 4 magazines, and soft carry case. Variable Interface System for red-dot attachment with no adapter plates Central Operating Group allows for changes in grip module, etc. Cold hammer-forged, Melonite-coated barrel Integral compensator for improved recoil control Ambidextrous controls White dot front sight/Tactical Rack U-Dot rear sight Billet machined slide with Melonite finish Oversized trigger guard Gear Pac includes Viridian RFX11 Green Dot Optic, 4 magazines, and soft carry case