TRADED The Glock 37 shoots the Glock Auto Pistol (GAP) 45 caliber round. Do not let anybody tell you that they can't get the ammo. I just sold 300 rounds to a friend who has a 37, and I still have over 175 rounds on hand (to go with this if you so desire). I was ordering the 45 GAP through my local Bi-Mart discount store in Roseburg. Last time I looked at the two gunshops in Roseburg they both had 45 GAP ammo on their shelves. This 37 has had no more than 300 rounds through it - all without any problems. I clean it after every practice run. I purchased an extra magazine for the standard $30 that Glock charges. I also have a new shoulder holster with the two clip carrier. This pistol looks and shoots great. This was/is my personal home defense weapon. I purchased a Sig 9mm to see if I would like it and I do...but I am also in the process of reducing my calibers down to two - 380 and 9mm luger. At one point I had 32 auto, 9mm mak, 40, 45 ACP, and 45 GAP, plus the above mentioned 380 and 9mm luger. All gone except for the nicest and most expensive, this Glock. I am now open to trades BUT only in 9mm semi-auto, without any added cash by me (fine if you want to add cash to your pistol)...unless you have something of greater value that you want to see if I would like. TRADED!