Thanks for the information! I thought that Miculek was wrong, but that's what he said. Seems far fetched that the Army would buy thousands of pistols that would wear out in 4K shots.

My Chow 45 is a 1945 vintage Colt made GI gun that F.Bob used as a base for this hardball gun.

By the way there was a very sad American Rifleman episode last night about how F.Bob Chow's original gunshop in SF was forced out of business by the communists in SF. I was lucky enough to meet and talk to F.Bob Chow when he was alive and talk about this pistol. He was quite a character. It is disgusting that in SF you can have open sex on the street or dine in the nude if you put a napkin down on the seat, but you can't have a gun shop open.