.45 ACP. 3.5" barrel length. SN: RIA1477898. Parkerized metal finish overall with brushed stainless finish to breech and mounting smooth wood grips. Short recoil operated single action autoloading pistol fed by detachable single stack magazines. Item mounts a skeletonized Commander hammer, bushing-less bull barrel, extended beavertail memory groove grip safety, low profile sights, and a beveled magazine well. Left slide is marked ROCK ISLAND ARMORY with model mark on the right frame reading M1911-A1 CS and the underside of the frame showing the maker marking APINTL-PAHRUM NV/PHILIPPINES. Comes in a matching black plastic hard case with one magazine, the owner's manual, and factory test casing in package.