I've had all three in the past 37,38, & 39 and moved on from them, due to it being an oddball round, ammo availability, and the fact that .45 ACP is the standard and just made more sense. but I recently got a smoking deal on some bulk GAP ammo.
The 38 was my favorite, so if I can find one for a reasonable price I'll keep the ammo, otherwise I'll just sell or trade it. It never ends lol.
Do you have a G19 or another Glock based on that frame?You could just get a G38 upper and some magazines and run it like that.You would probably have to change the ejector,but that is no big deal.
Well thats a good question.I looked at Glockmeister and they have nothing in 45 GAP or 357 SIG,just complete uppers for the run of the mill calibers.You might give them a call if you want to pursue that avenue.