I got an AR upper and lower, and I ran into a problem trying to put them together.
The lower is an LMT Defender, and the upper is a Rainier Arms / Daniel Defense job.
The takedown pin dropped in just fine, but the pivot pin did not. I tried gently tapping it in with the plastic handle of a screwdriver, and now the pin is stuck just far enough in that I cannot separate the halves.
Honestly, I did not tap hard, and I am surprised it is stuck, seemingly quite firmly too. I am also surprised that there is a fit issue with what I believe(d) to be high quality parts.
No damage was visible to either part before I attempted assembly.
Where do I go from here?
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