I've run into an issue with the a few different types of Magpul magazines, and thought a heads-up was in order.
First issue was the LR308 type 20 and 25 round magazines. If you leave them loaded for any length of time, even with the feed lip cover installed, the top of the magazine will spread open to the point that you'll be able to see the case head of the ammo from the top of the magazine spreading under the springs tension.
Second issue, and I just encountered this one today, but the 40 round 5.56 magazine has the same issue, and I found it out at a local CQB match this morning. Its feed lips were spread apart so far I got multiple failures to feed, and double feeds.
As far as the standard capacity 5.56mm 30 rounders are concerned, never had an issue yet, and I've left some loaded and stored with the feed lip covers on for years.
Again, just a heads up.......
First issue was the LR308 type 20 and 25 round magazines. If you leave them loaded for any length of time, even with the feed lip cover installed, the top of the magazine will spread open to the point that you'll be able to see the case head of the ammo from the top of the magazine spreading under the springs tension.
Second issue, and I just encountered this one today, but the 40 round 5.56 magazine has the same issue, and I found it out at a local CQB match this morning. Its feed lips were spread apart so far I got multiple failures to feed, and double feeds.
As far as the standard capacity 5.56mm 30 rounders are concerned, never had an issue yet, and I've left some loaded and stored with the feed lip covers on for years.
Again, just a heads up.......