The old aluminium 20-rnd mags have very weak feed lips. I use about 50 of these things and with use, the weak feed lips will spread or become deformed, allowing double feeds to occur.
Newer style 20-rnd mags, like Pmags, should run fine, however.
__________________
God gave you a soul.
Your parents, a body.
Your country, a rifle.
Keep all of them clean.
|