Caliber: 45 ACP. Barrels: 4.25”, 5”. Features: Similar to 1911A1, except checkered frontstrap and mainspring housing, Novak Night Sight combat rear sight and matching dovetailed front sight, tuned, polished extractor, oversize barrel link; lightweight speed trigger and combat action job, match barrel and bushing, extended ambidextrous thumb safety and fitted beavertail grip safety. Textured G10 grips. Finish: Blued or stainless. Values are for the Operator model, which has a full dustcover and adjustable sights. The Classic model is full- or commander-size with Hydro G10 grips and no accessory rail (add 3%). The CC model has a bobbed frame (add 13%). The AOS (Agency Optic System) variant is optics-ready (add 10%). Tactical Response Pistol, features Springfield’s semi-custom hand-matched and -fitted parts.