Caliber: .45 ACP. Features: Similar to the 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.