I recently completed my 2nd AR build chambered in .308 using an Aero Precision M5 carbine lower build kit with adjustable stock, toolcraft ar10 bcg, 20” Davidson Defense upper with Aero Precision M5 upper receiver. I’ve tried firing multiple types of ammo and I get the same problem. Brass is ejecting at 3 o’clock approx 1ft away but it will not pick up the next round or the next round will jamb. It has cycled 3 rounds at most and then will continue without picking up the next round or will jamb. Im assuming rifle is under gassed or maybe a different bcg is needed. Not sure what my next step should be to correct the problem.
