chakup
02-10-08, 19:07
Took out a new upper yesterday, and started having failures to feed- bolt would stop about 1/2" from full closed. started checking things over, all seemed fine when doing it piece by piece. swapped out bcg and it ran fine. Best I could tell was the bolt was dragging across the magazine feed lips causing it to lock up. Hadn't really seen/heard of this before so wondering if our guess could be correct or if there may be something else to check.