The Glock aftermarket magazines that I have run enough rounds through to determine they are reliable and fit for carry are limited to one brand, MagPul, and these are $15 bucks apiece, if I buy three and one malfs in the gun, I can toss it (that hasn’t happened yet). If I drop one free to the ground and I step on it & crack it, I can toss it (also hadn’t happened yet). These $40 Shield Arms mags are a lot pricier than what I would spend for any Glock mags, and they are made from unobtanium. No manufacturers that I know of have produced a metal tube Glock magazine for a Glock pistol that was designed to work with a polymer tube and either a full or partial metal liner. So what are the long term effects of that metal tube on the plastic mag release in the gun?
Fact is, I have no dog in this fight since I’m in Cali & the G43x and G48 aren’t CA DOJ rostered in the first place and 15rd. mags are verboten here anyway, but I’m anxious to see if these new mags live up to all the hype they seem to be creating.