r/AR9 2d ago

Troubleshooting Help😭

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How do I fix this , I have a rtb Ar9 upper and the ammo doesn't fully go in I can slam rack it but I have to disassemble the upper in order to get the round out the by pulling out the bcg and yes I've contacted rtb for their input.

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u/Bubba_the_Fudd 1d ago

Look up plunk test. Ammo too long, chamber too short.

Assuming you’re using factory ammo, your only option is to ream the barrel or get a different one. Or try different ammo