[caver]

“I considered getting some machine tools and manufacturing a carbine in 45 ACP that accepts 1911 magazines.”

Marlin Camp Carbine

[JamesP81]

Marlin Camp Carbine

No longer in production and way over priced considering what they were worth new. I looked into them. Marlin quit building them because they were afraid a criminal would use one in a crime :\

I'd make something similar to that though, except I'd try use gas operation instead of direct blowback like the Marlin. I could probably use a short stroke piston easily enough, but I've got an idea for new gas operation system that might be viable if some of the limitations can be overcome. It would provide the inherent accuracy and lightweight of direct impingement systems (like the AR15) but the reliability of gas piston designs (AK-47, Mini-14, M-1 Garand).