I have a PSA gen2 upper and lower PA-10 with a Faxon barrel and Ballistic Advantage BCG. The receiver extension & buffer is PSA's PA-10 version. I fired for the first time this weekend and got about 2 rounds off before the BCG stuck to the rear, locked open. It is binding on something, but I can't tell exactly what. Its not the Bolt catch, as you can see in the pics, its a good bit further back to the rear and the catch isn't coming into contact at all. I disassembled everything to see if there were any noticeable wear marks anywhere, and say some strange marks on the threads on the receiver, but nothing corresponding on the BCG.
Any ideas on where to start troubleshooting? Im stumped here....
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