Colt 1911 US Government Property , 1918 Mfg, WW1 issue re-arsenal at Augusta Armory (AA on frame) for WW2. I suspect this m,ust have been an officers pistol, as they would often have the arsenal guys put them together a tighter pistol when re built, because this is a seriously tight fit 1911. Slide to frame is tight (unheard of), but more importantly the barrel link fit and barrel bushing fit are tight.