I have one of the early springfield TRP 1911's. Picked i up in 1998 or 1999, it is the champion model TRP which they don't seem to market these days.

Anyway, it came with two Chip McCormick mags, and starting from almost day one the slide never consistently locked back using these mags. The pistol seems to work fine using the mag from my kimber 45 and using the mags from my springfield loaded 45 that I picked up last year.

So, fortunately it looks like I have been pinpoint this to the McCormick mags being the issue and am now looking for some replacement mags for this pistol.

Any suggestions?