This week, we are going to take a look at an odd one, and not just for historical reasons. I was able to procure a Glock 37 and 1000 rounds of ammo to feed it recently for $800. That is a used gun off the secondary market, but it was available and not badly priced. Considering how crazy the gun market has been, you could do a lot worse. Why could it be had at that price? Because a Glock 37 is chambered in 45 GAP.