I've got some 20, 25, and 50-round stick mags for 1911s. They work well except are a PITA to CC, which is OK since I OC. They do make sitting in a booth, or even in the car, "challenging". Straight-back chairs with no arms work.
But I do get a few "looks" wearing Thompson mag carriers and my Camp carbine slung over my shoulder.
Best I have found that work are 19-round BHP mags.
Want moar for both.
stay safe.