I've always liked the idea, I once had a Colt Ar in 9mm, bowling pins at 50 yards were no trouble, I wished I had it back but I traded it and 300 bucks for an M1a, that was before the ban when the car15 went to over 1500 bucks, LOL, but I still have the M1a, and it is definitely a keeper. I have had a marlin in .357 but I don't usually carry a .357 pistol in the woods. I definitely appreciate the findings on the Glock or 1911 mech-tech conversions, I don't know anyone who has tried them. Dang it, Brownells closed out on some of these for a very reasonable price in the odd calibers, eg... 10mm for the glock. I am actively seeking a .44mag carbine, just waiting for the right deal. I had a Rossi Puma in .44 mag, and it would not feed, traded off very quickly.