I recently built an AR-9 using a QC 10 Glock 9mm lower and a Ballistic Advantage 5.5" 9mm barrel. Took it to the range today and it was jamming rounds. Not double feeding, but actually jamming the 9mm round up against the feed ramps and getting caught before going into battery. Pulled out the rounds and this is what I see:
SO...do I just need to polish the feed ramp? Is my buffer spring too strong? Looking for insight.
SO...do I just need to polish the feed ramp? Is my buffer spring too strong? Looking for insight.