AMU; 'Army Marksmanship Units'. There was a great gunsmith in my home area for many years who had been one of those armorers - Reuben Boatwright.I remember an article or chapter in a book on the armorers at bases that would work on 1911s for their pistol teams. They fit NM barrels and did other mods. Basically, they built their team's guns.
USGI national match pistol built by Springfield military arsenal in 1960s. That particular slide was made by Colt under military contract. Frame is a WWII Ithaca. The picture is to make reference to OP's question about the slide marking.mlin,
Can you provide more info on the gun in your picture? The slide has serrations like a 70s NMGC. But clearly it is not that.
Agree with this. Without provenance/ documentation to link to AMU, it's unlikely to be recognized as legit military built competition pistol. Other possibility is that an AMU smith built pistols on his own time with new frames and surplus parts and over time people get second hand information referring as USGI competition pistols?Anything is possible BUT it is extremely unlikely that the military would use a frame of unknown quality to build a match gun. The more likely story is the pistol is the work of a civilian gunsmith using surplus military parts on a Essex frame.