I have a Colt Mark IV Series 80 9mm that is factory 9mm, got it quite by luck my son called me from down state and ask if I would be interested in the gun for what the man paid for it. He had the sales slip, box, and 1000 rds of PMC ammo and needed his money back on the gun. I told my son that a ck was in the mail as he wanted $350 for all of it. The gun was NIB at that time, I have shot up that 1000 rds and three or four more. The 9mm in a 1911 is like shooting a lot less because of the weight of the steel framed 1911.