I brought up the "other" .45 in another thread and got this response: I didn't want to hijack the thread, which was about small carry 1911's, but was curious about this round. Let me first say that I don't own a .45 GAP, and have no experience with them. Is the .45 GAP really a "horrible" round, or is it suffering from the same fate as the .41 Magnum? While GAP may be a "solution to a problem that exists only in the mind of the seller", namely the brick-thick grip of the Glock 21, it does seem to put of decent numbers. Maybe Glock should have thought a little less outside the box, and simply designed a slimmer grip that would accomodate the .45 ACP (think Springfield XD, Smith M&P), but they didn't and this round is out there. Anyway, I'm curious to crack open the hood on the .45 GAP and see why people do or don't like it, and how it stacks up against other self defense loadings.