the promag 50 rounder drum is crap
X2!! i bought one even though i was told not to. POS for sure. can't chamber more than the first round. how are you supposed to "break in" the mag when it won't feed?
i just got the BlackDog mags today, going to try them out in the morning.
i just modded my promag with a BC steel lip feed lip's still gotta take it out and really try it.