I ordered an AR15 in 7.6x39 about 2.5 years ago now. I had a feeding problem just the opposite of most it fed steel, but not brass. It ended up being an extractor but I bought a new bolt as there were no extractors to be had at the time as a 5.56 extractor was not working for me. New bolt solved the issue and I have since fixed the extractor so I have a spare bolt.
The thing is just fun to shoot! Not the most accurate by any means, but it gets the job done with cheap Wolf and Tula ammo.
