Welcome! Please take a minute to introduce yourself.

AR-10 (T) barrel OD question

More
8 years 5 months ago #47618 by grizgrin
AR-10 (T) barrel OD question was created by grizgrin
Total newb question, and I mean it sincerely.

I did some searches for the OD of the (T) barrel, specifically interested in the barrel forward of the gas block. I am interested in threading mine. I have seen it stated here in an excellent post (by Sharkey, I think?) That the -10 OD is 5/8", however I do not know if that is the same for the -(T).

Anyone know, or willing to measure theirs and get back to me? I am travelling and trying to line up parts for delivery to my home while I am away for a few weeks.

Thank you for the information on this site.

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #47619 by jtallen83
Replied by jtallen83 on topic AR-10 (T) barrel OD question
I'm not sure it matters what the OD is before threading. If you are going to thread it to accept 30 cal muzzle devices then it will need 5/8 x 24 threads. Pretty sure the OD befor the muzzle is .700 to .730 on a standard 10 and .850 on a T but I don't have a T to measure myself. There is a good chance of differences even within the same model numbers due to changes in suppliers.
Unless you are doing the work yourself I would recommend ADCO, great work, fast turnaround, and a very reasonable rate;

www.adcofirearms.com/shopservices/shop_q...e=Barrel%20Threading
The following user(s) said Thank You: MrMarty51, grizgrin

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #47620 by Siscowet
Replied by Siscowet on topic AR-10 (T) barrel OD question
My suggestion is to call or email Armalite tech support with your rifle serial number. They could provide the answer especially if there are discrepancies over time between rifle lots as to the diameter.
The following user(s) said Thank You: MrMarty51

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #47623 by MrMarty51
Replied by MrMarty51 on topic AR-10 (T) barrel OD question
When I wanted to get the end of the barrel threaded on My AR10.
I got a muzzle break from Armalite for fifteen bucks, on sale, closeout I think.
I took the rifle to a friend that has a lathe, He dismounted the barrel and chucked it into the lathe then trimmed what was necessary to be sure it was all true. He then set up the lathe for cutting threads.
Turned out very nice.
The muzzle break has a set screw but even so, He cut the threads so that the break bottomed against the shoulder that He cut into the barrel, set screw, with a very short plug of bronze welding rod dropped into the set screw hole to keep from damaging the threads, was then tightened down so that the break could not come un~Screwed.
That really made that rifle into a very tame shooter.
I would take the rifle to a known very good smith then have the smith measure the end of the barrel to be sure that there is enough meat there for trimming and threading.

Please Log in or Create an account to join the conversation.