This--------> http://www.gunbroker.com/Auction/ViewItem.aspx?Item=309612168 You can fit 9 rounds of 45 GAP to a Glock 38 magazine like the one I am selling on the link. (Extended Magazine as a backup) I know the G38 magazine specs. says it can fit 8 rounds, but it will fit 9 rounds using a magazine loader by Glock. 9+1 if you load one in the chamber. The Glock 37 magazine can fit 10 rounds, but it will not be flushed or no magazine spacer available. Wanna kill these ads? We can help!