Because of the "no replacement" and "buy all spare parts at the same time," I would have to do a heck of a lot more research to decide on all six. But for starters:
Since the "gun" part of the Mk3/45 series is the receiver/barrel, I would get both grip frames out of the deal in my spare parts package. Unfortunately, barrel is going to be fixed. I would go with the Lite with a threaded barrel, I suppose.
The Glock frames seem to take a beating. I would get plenty of spare parts, and a spare OEM barrel (or maybe a threaded barrel?) for when they start to wear out after 80,000 rounds.
I would have a G21 and a 9mm... Maybe a G19. Maybe a G35... Haven't quite decided. Probably the G35 in case I want to do any competition shooting.
I would really like to have a 10mm Glock, but the whole "can only buy factory ammo" kind of spoils it. For that matter, who in their right mind would take a 45 Colt over a 44 magnum, in light of that restriction?
The 357 is easy. I'd get a Dan Wesson with the exchangeable barrels and at least 4 different length tubes for it. Hunting, HD, or CC. Got it covered.
I would have to do a lot more research before settling on my CC guns, in either 380, 40SW, or 9x18, I suppose. From what I'm left with. I would probably choose 9mm for CC irl. But I think I'd rather use that caliber on my range/fun gun, considering the crazy restrictions in the OP. Can I have a PPS/G26 reamed out and registered as a 9x21?
