I have the .223 with the AR mag adapter, with an NEA forward top rail and a mid range red dot.
The gun would sometimes slice an ejected case in half (only with Norinco ammo it seemed), so took it to North Silva for warranty work.
They replaced the gas tube. Had the gun back in 3 days, shipped.
Works great now. Accurate, reliable, fun and non restricted.
This gun will be a keeper.