Doesn't have a threaded or three lug barrel. The barrel is pretty much flush with the front of the triple tree. I put about 50 rounds through it this afternoon. Initially had magazine problems. Some of the first purchasers of these got two mags: one hk and one aftermarket. I just got the cheapo aftermarket one which is how the gun is currently advertized. As expected the mag gave problems. as in, FTF every other round. I took the spring out, stretched it and tweaked the mag lips toward the front to allow the bullet to angle up a little better. No more FTF failures after that.
Next problem: out of the next 30 rounds, there were about 7-8 FTE's. Every time but one, the bolt lost the spent case inside the gun and hung up on it after partially chambering the next round. This is going to take some thinking. Two other guys shot it and it didn't jam at all on them. (one only shot three rounds and the other shot nearly ten). Makes me wonder if i just wasn't holding it tight enough? I will probably go ahead and order a new extractor and a couple of springs just in case.
Question: ejector lever looks like it's fitting in the groove right, but it's impossible to see inside the receiver at the time in which it would be moving backwards and fitting into the bolt slot. So, how do you determine if it's not hitting right?
I'm not dissappointed in spite of this. I basically expected to pay 1k for a good completed barreled receiver with all the sights/levers, etc and a workable bolt/carrier group. (Add, of course, the $200 fun tax for SBR that will be send off this week...) If i have to spend another $500 for a good bolt/carrier and make it perfect it still was a deal.