Hey Redrum, welcome aboard! You're starting to sound like me already, yet this subject comes up so often people would be wise to use the archives. When in doubt, buy a Wilson! I have some Mecgars, some CMC and a few GI and in my USGI gun all seem to work. I have Colts that are picky eaters. The other mags get used for range and competition only, wilsons for carry. Get the steel basepads, the mags drop better, plus over time the plastic will break.