So I'm working on a retro project that involves an AR-10A2 Carbine upper receiver. I bought the upper used and complete, and it came with midlength handguards and Armalite spec midlength gas system.
I set out to rebarrel it with a midlength gas system DPMS spec barrel made by Ballistic Advantage, and a DPMS spec BCG from Brownells. All gravy so far.
When I went to put everything back together, I ran into a problem that took me a couple of days to figure out. The handguards wouldn't fit between the handguard retainer cap and the delta ring. I compared them against 4 different drop in midlength handguards from as many different manufacturers, and they were all the same size. Everything else was where it should be and fit together fine. What the hell was the problem?
Turns out the Armalite barrel nuts not only have a proprietary thread pitch (Armalite is 1-7/16"-18, DPMS is 1-7/16"-16, which is why I intended to reuse the Armalite barrel nut assembly,) but they're LONGER than DPMS spec barrel nuts by just long enough to be a pain in the ass.
Long story short, I need a 308 size DPMS length barrel nut for a delta ring and drop in handguards, with the Armalite thread pitch (1-7/16"-18) inside.
I was referred to this place by a machinist friend in the industry to find a small shop that could make the barrel nut for me. I only need the one. Is there anyone here that can help me with this?
I set out to rebarrel it with a midlength gas system DPMS spec barrel made by Ballistic Advantage, and a DPMS spec BCG from Brownells. All gravy so far.
When I went to put everything back together, I ran into a problem that took me a couple of days to figure out. The handguards wouldn't fit between the handguard retainer cap and the delta ring. I compared them against 4 different drop in midlength handguards from as many different manufacturers, and they were all the same size. Everything else was where it should be and fit together fine. What the hell was the problem?
Turns out the Armalite barrel nuts not only have a proprietary thread pitch (Armalite is 1-7/16"-18, DPMS is 1-7/16"-16, which is why I intended to reuse the Armalite barrel nut assembly,) but they're LONGER than DPMS spec barrel nuts by just long enough to be a pain in the ass.
Long story short, I need a 308 size DPMS length barrel nut for a delta ring and drop in handguards, with the Armalite thread pitch (1-7/16"-18) inside.
I was referred to this place by a machinist friend in the industry to find a small shop that could make the barrel nut for me. I only need the one. Is there anyone here that can help me with this?