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Ar9 trouble feeding

gregmanz

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I am having an issue with hollow points and 147 grain feeding. It hits above the chamber mouth. I sent the barrel to Macon armory and had it tapered but still no luck. Running factory glock mags.

Upper is an NFA side charger also. Going to call them Monday but figured I would give here an ask also
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Are you putting any pressure on the mag? Holding it? resting it on the table?
What lower?
How much play in the mag well?

Mag is holding itself, no external pressures, tight fit. Lower is an AAO MFG 80% lower

I need to take a look at the bcg, doing some more reading and it could be a possible issue

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I'm having similar issues with endo mags , only on the 1st round, the gun cycles almost perfectly when round is chambered by the blowback of a fired round
 

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So the problem is when you manually chamber a round, when firing they feed fine ? Tried a variety of mags ?
 
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