First off, I am not a gunsmith, nor do I play one on TV. I'm just someone who's interested in getting a 3 inch 1911, but I keep hearing that they are either unreliable or, at best, finicky to keep running properly. Apparently, everything has to work just right in a mini 1911, and there's simply no margin for error. Which leads me to my question: If you took a standard 3 inch 1911, and modified it to accept the 45 GAP cartridge, then it seems like you might literally wind up with more "room for error" with the shorter cartridge. You'd have to change the barrel out to get a 45 GAP chamber. You'd need to change the extractor to work properly with the smaller rim on the GAP. A regular 45ACP magazine will hold 45 GAP cartridges, but it seems like you'd want a spacer in the back(?) of the magazine so the shorter GAP cartridge doesn't slide back and forth at random. Since the GAP operates at 45ACP +P pressures, you might need a slightly stronger recoil spring as well. What's the point of all this? Well, the GAP is about two-tenths of an inch shorter than an ACP. Since the GAP is shorter, extracting cartridges would clear the chamber faster. Ejecting shells would have extra room to clear the ejection port. Fresh cartridges coming out of the magazine would have an extra two-tenths of an inch clearance. It certainly seems like all this might make for a more reliable pistol. Back when the GAP was first introduced, I vaguely remember some gun writer saying that it would have the potential for making small 1911's more reliable. But I don't ever remember hearing of anyone trying the above to see if it would work. Both Springfield and Para have made mini 1911's with the GAP, but they did so by downsizing the entire frame to fit the shorter cartridge. My thought is to keep the entire gun sized for the 45ACP, but then put a shorter cartridge in it. A not insignificant bonus is that you wouldn't need to buy a separate gun to get these benefits, you could just buy a parts kit and modify the mini 1911 that you've already got. Has anyone ever tried this? Wanna kill these ads? We can help!