Technosavant
New member
I have to wonder though if it's the no-tilt follower design with the Pmags that makes them so reliable. I'm new to AR's, but just poking around at a gun show I noticed all the aluminum mags, even with the green followers, would tilt and felt fairly gritty.
That's part of it.
The fact is that the STANAG is not a very good magazine design. It's thin, tends toward weak feed lips, and was originally intended for shorter straight 20 round mags... going to a curved design for 30 rounds didn't do it any favors. The rounds go from a curve section to a straight one. That's just messy.
The Pmag uses a constant curve inside the entire magazine (hence the slightly thicker mag that won't always drop free from tighter magwells), and that helps too. The anti-tilt follower also helps keep rounds in the proper orientation for chambering. You can also get anti tilt followers for GI style aluminum or steel mags (in fact, the current USGI spec with the tan follower is pretty close to the Magpul Gen III anti tilt follower that's been commercially available for quite some time now).
Generally, when a STANAG fails, it's a problem with the feed lips. They get spread out, dinged up, etc. Since they're so inexpensive, you don't rehab the mag, you toss it and replace. There isn't even much point in getting just the body and swapping over the follower, spring, and floorplate (the only reason I'd keep the floorplate is if it's a Magpul one I put in). The magazines just aren't as hardy as those for AK pattern rifles or even the Ruger Mini. However, the mags cost a fraction of the others. Even using stainless steel instead of aluminum doesn't fix the issues with the STANAG design... the HK mags are very expensive ($50ish) and don't seem to work any better than the $10 USGI ones from Brownells.
Is the magazine a weak point in the AR design? Sure. Is it the downfall? Don't make me laugh. Of course not. Just buy quality mags and toss them if they become problematic. They aren't enduring items, they're wear items. So the Ruger or AK mags last three times as long; they also cost three times a much and aren't as quick to change. You pick your tradeoffs.
Moral of the story: learn the weaknesses of your chosen system and how to deal with them. In this case, buy and stockpile mags, and when one gives problems, just toss it, replace it, and think no more of it.