AR15 barrel nut shims?

Discussion of rifles, shotguns, and muzzleloaders

Re: AR15 barrel nut shims?

Postby Holland&Holland on Sat Mar 31, 2018 11:52 pm

mc762x54R wrote:The range is 30 to 45 for this one, and its no where close without a buch of shims to back it off. They just didn't supply enough of them.
Without shims its about 45°off. 45 ft lbs wouldn't do it.

Why would it be different? Weaker metal is the upper, not the nut.
User avatar
Holland&Holland
 
Posts: 5268 [View]
Joined: Mon Jan 12, 2009 9:17 am

Re: AR15 barrel nut shims?

Postby Ghost on Sun Apr 01, 2018 5:38 am

Holland&Holland wrote:
mc762x54R wrote:The range is 30 to 45 for this one, and its no where close without a buch of shims to back it off. They just didn't supply enough of them.
Without shims its about 45°off. 45 ft lbs wouldn't do it.

Why would it be different? Weaker metal is the upper, not the nut.

I’ve read of people torquing barrel nuts to 120 and then stripping the wrench off the nut. But, I also read about one of these nuts stripping much lower and needed to be removed with a pipe wrench and cheater.

I’m glad I don’t use barrel nuts that require indexing anymore.
User avatar
Ghost
 
Posts: 4204 [View]
Joined: Wed Feb 05, 2014 8:49 pm

Re: AR15 barrel nut shims?

Postby Holland&Holland on Sun Apr 01, 2018 7:11 am

Ghost wrote:
Holland&Holland wrote:
mc762x54R wrote:The range is 30 to 45 for this one, and its no where close without a buch of shims to back it off. They just didn't supply enough of them.
Without shims its about 45°off. 45 ft lbs wouldn't do it.

Why would it be different? Weaker metal is the upper, not the nut.

I’ve read of people torquing barrel nuts to 120 and then stripping the wrench off the nut. But, I also read about one of these nuts stripping much lower and needed to be removed with a pipe wrench and cheater.

I’m glad I don’t use barrel nuts that require indexing anymore.


But 45 is a far cry from 80 or even 60.
User avatar
Holland&Holland
 
Posts: 5268 [View]
Joined: Mon Jan 12, 2009 9:17 am

Re: AR15 barrel nut shims?

Postby Ghost on Sun Apr 01, 2018 7:39 am

Holland&Holland wrote:
Ghost wrote:
Holland&Holland wrote:Why would it be different? Weaker metal is the upper, not the nut.

I’ve read of people torquing barrel nuts to 120 and then stripping the wrench off the nut. But, I also read about one of these nuts stripping much lower and needed to be removed with a pipe wrench and cheater.

I’m glad I don’t use barrel nuts that require indexing anymore.


But 45 is a far cry from 80 or even 60.

Agree
User avatar
Ghost
 
Posts: 4204 [View]
Joined: Wed Feb 05, 2014 8:49 pm

Re: AR15 barrel nut shims?

Postby BigBlue on Sun Apr 01, 2018 8:46 am

Not that it matters for the OP, but Aero Precision's Enhanced uppers use a male threaded barrel nut with no need to index anything because the hole for the gas tube and holes for the handguard screws are machined into the upper itself. Makes things quite easy... Just torque to spec and you're done.

BB
BigBlue
 
Posts: 1315 [View]
Joined: Fri Oct 23, 2009 9:33 pm

Re: AR15 barrel nut shims?

Postby mc762x54R on Sun Apr 01, 2018 8:38 pm

I don't know why its 45 ft lbs max, unless they engineered the nut threads to fail before the threads on your upper?
User avatar
mc762x54R
 
Posts: 241 [View]
Joined: Sat Aug 07, 2010 6:56 pm

Re: AR15 barrel nut shims?

Postby Holland&Holland on Mon Apr 02, 2018 9:34 pm

mc762x54R wrote:I don't know why its 45 ft lbs max, unless they engineered the nut threads to fail before the threads on your upper?


But the upper spec is 30-80 so it just does not make much sense that it would fail at 45.
User avatar
Holland&Holland
 
Posts: 5268 [View]
Joined: Mon Jan 12, 2009 9:17 am

Re: AR15 barrel nut shims?

Postby Dutch on Wed Apr 04, 2018 4:51 pm

I got sheets of .001 and .002, you’d need to cut it to the right size. Can bring some to the range some time in the weekend (if it don’t snow).
Edit: I must be confused, I thought you were west of the twin cities. I can mail you some too.
Men may argue forever on what wins their wars, and welter in cons and pros, and seek for the answer at history's doors, but the man with the rifle knows.
User avatar
Dutch
 
Posts: 259 [View]
Joined: Wed Sep 21, 2011 6:51 pm

Re: AR15 barrel nut shims?

Postby mc762x54R on Fri Apr 06, 2018 8:57 am

Aero said 55 to 60 is OK if I go slow
I gave up on this upper and got their enhanced that has the handguard attachment separate from the barrel nut
I'll use their regular upper for my next build.
I ordered more shims, but I don't like the idea of having 12 or 13 shims stacked up in there.
User avatar
mc762x54R
 
Posts: 241 [View]
Joined: Sat Aug 07, 2010 6:56 pm

Previous

Return to Long Guns

Who is online

Users browsing this forum: No registered users and 1 guest

cron