My first precision rifle was a TRG 42 in 300 WM (hence my handle), and I have ran thousands of rounds through my TRG 42 mags. They are really good mags. They hold 7 rounds of 300 WM, where the AI mags can hold 10. They are each a different mag, but do the same thing and are both a quality item. I think the bottom metal options will be more for the AI mags. Either mag system will work flawlessly for you.