I miss my AR-10. Since I refused to register a rifle in Kalifornia that I already owned, my rifle has been residing out-of-state for some time now.
When I first purchased it, I had reliability problems.
The first problem was a failure to properly eject. The expended brass would get caught by the bolt and prevent proper feed of the next round. I puzzled over this quite a bit, finally taking measurements of clearances. Much to my surprise I discovered that the manufacturer had mis-assembled my rifle and installed an AR-15 buffer which is longer than that for the AR-10. The proper part allowed the bolt to retract about a half inch farther and the ejection problems were over.
I then discovered that there was a problem with chambering some ammo. Examination of the rounds that failed to chamber revealed that they were getting caught on a slight ledge where the barrel mated with the feed ramp. A local gunsmith polished this area for me. Since that time I had no reliability problems whatever. It's a fun rifle to shoot.
When my Springfield Armory M1A arrived (the replacement for my AR-10) I had feed problems with it. My success in trouble-shooting the AR-10 made me confident that I could find the problem. The problem turned out to be that the hole which directs gas from the barrel to drive the ejection apparently had a burr in it, preventing sufficient ejection force. A couple of small drill bits cleared the hole and the rifle now works fine.
If the manufacturer hasn't been able to make the rifle work, then I recommend that you find someone to go shooting with you who is comfortable with how the rifle works and who can experiment with it to find the problem.
I'm done with it, and will be purchasing an M1A SOCOM ASAP.
I'm done with it, and will be purchasing an M1A SOCOM ASAP.
I have a closet full of rifles and pistols that don't quite work I am going to send you.