Hey folks. In need of some knowledge from those who have it.

With the magazine restrictions coming, I want to stock up on extras for my .22 tactical Colt lr. I've been told that the only mags which will work in this are the Umarex ones. Can anyone confirm, or refute this? IE, would a CMMG Ar-15/M16 .22 LR Magazine work or do I need the Rimfire 30rd Umarex Mags?

Thanks in advance!