Bushy Castle Nut

[aab23c]

So on my Bushmaster xm-15 I have been trying to get the castle nut off to put an ASAP on, and its near impossible. I don't think there is locktight on it, but i have no idea, has anyone else experienced this? if so how have you been successful in getting it off? I have been using a TAPCO 3 prong and it will not budge at all, even started tapping the wrench with a hammer for leverage, but still nothing. I am afraid I am going to start to either dent the threads, or tear up the nut at this point.

suggestions/assistance/fear?

 

[BUFF7MM]

I'm not familiar with the wrench you are using, but when you mention possibly damaging the threads it makes me think it's the wrong wrench for the job as my wrench never comes close to touching the threads.

 

[aab23c]

its http://tapco.com/products/ar/index.php?_a=viewProd&productId=110 its worked on my two other AR's without a hitch, this castle nut is just WAY WAY tight

 

[BUFF7MM]

Here's basically the same wrench I use for the castle nut.
http://www.wayfair.com/NcSTAR-Combo...=25814645220&gclid=CKeegePa5LsCFcZZ7Aod8X4ARg
I use the end piece and hook it in the dimple on the nut.
As far as yours, the nut isn't staked is it?

 

[aab23c]

Just found this on Bushmasters website

:: We do not use a threadlocker like Loctite on the Castle nut but some heat applied with a propane torch may help. A lower receiver vise block http://www.bushmaster.com/products.asp?cat=15&zoom_highlight=OM-006 is what we use to install them which allows a lot of torque to be applied.::

SO according to them its just on tight...

 

[BUFF7MM]

Just found this on Bushmasters website

:: We do not use a threadlocker like Loctite on the Castle nut but some heat applied with a propane torch may help. A lower receiver vise block http://www.bushmaster.com/products.asp?cat=15&zoom_highlight=OM-006 is what we use to install them which allows a lot of torque to be applied.::

SO according to them its just on tight...

Vise blocks are a definately plus when working on an AR.