I was hoping the other persons thread would help me too, but it didn't.

I have an AR-15 Pistol, that I built myself from Palmetto Armory components.

This is one of several rifles I have built.

This rifle, misfires. Often. Probably once per 30 rounds, and once it starts misfiring, it keeps misfiring (heat related?)

The symptom of the misfire, is that the spent round is not fully ejected, which causes the next round to get snagged up, etc.

Any guidance would be appreciated.

-John