I found one of them to feel sorta "crunchy" and to have a feeding problem in that the follower would hang up about halfway through the magazine.
I popped the mag apart and found that a sloppy/oversized spot weld inside the magazine was catching on the follower and stopping its upward progress.
Out-fucking-standing! This meant...being finicky and anal about this kinda thing...I would have to completely disassemble all ten mags and inspect them.
I found five out of ten of the mags to have this spot weld problem.
|These are the spot welds and their locations inside the mag. The welds pictured are not the problem welds. The problem welds were much larger and more pronounced.|
So, I took a long narrow file and knocked down all the spot weld burrs I could find...and reach.
Then, I took a look at all the plastic followers. I found some minor mold flashing on all of them, and smoothed them down with a hand file.
My last step was to lightly oil the mag springs and the inside walls of the mags themselves.
I slapped all ten mags back together, and worked all of them up and down vigorously until I was tired and satisfied and needed a smoke.
The mags seem smoother now and not crunchy at all.
It's a damn shame Bushmaster couldn't be assed to do this kinda thing before they put these mags on the market.
Unless I find a metric shit ton of them for almost free, I won't be buying any more Bushmaster mags.
I guess I'll stick to Magpul. I haven't had any issues with their shit.