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NEED HELP- PSA AR9 GLOCK LOWER, and 8.5" upper not PSA

StantheMan

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Need help with this thing.

I got this gun finally completed as of a couple of weeks ago. Wanted to shoot for free so I waited until I got to the country to send some down range. I got my OEM 33rnd round mags loaded and, charged it, and the bolt didn't go forward all of the way. Almost like the round wasn't entering the barrel. Quite odd.

I cleared that round and tried it again. Same thing. OK......

I took it to a local gun store/range, and the guy stated it was probably my buffer. Its heavy as hell...maybe 8 oz straight from PSA. thought changing that would help.it didn't.

We oiled it up, (put original buffer back in) and she would cycle a round or 2 with no issue, and then it would happen again (failure to feed). Im hearing it may be the feeding ramp, which was polished, but that didnt fix it. Then i heard It may have been how the barrel was chambered. At that point i reached out to the supplier where they advised they didnt have any issues (after i sent the part back), AND they confirmed we were using the same lower, so they dont understand. I advised them of the issues and the indentations that were showing up on a few rounds i saved from the range to show them. They werent able to assist. So im hoping someone here can help me save my AR9.

Any thoughts? Thanks for your time.
 

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maybe try taking 2 rounds out of the mag before charging it? had some 15-22 mags do something similar took a couple of rounds out of the mags and it ran fine? just a guess
 
Don't worry about the buffer. I run an 8oz buffer and a 308 carbine spring in mine and it runs like a champ. Almost looks like your chamber is too tight. Are the rings in the first picture where the round loaded to in the chamber?
 
Something is dragging your bolt assembly. Check your ejector and adjust, or charging handle for out of spec and mag catch to make sure the mag is not sitting too high.
 
Ar9 builds are temperamental. I have one that doesn’t run either. It’s on the back burner though to get running. I decided to get an mp5 and mpx to play with in the meantime

Sent from my iPhone using Tapatalk
 
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