Colt model 1911A1. WWII military .45 ACP caliber with 5 " barrel. All correct original WWII Colt with correct markings and NOT an Arsenal rework. Barrel and all parts are correct. Manufactured in 1944. Getting very hard to find un-messed with WWII 45's in original condition. This is correct and an excellent investment in American Military history. More questions on request.