Gunsmithing Castle Nut Tool Recommendation

buyobuyo

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Apr 14, 2010

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Camden, AR

Jul 4, 2024

#1

• Jul 4, 2024

• #1

As the title suggests, I'm looking for recommendations on Castle Nut tools. I have a standard AR armor wrench, but it chews up the buffer tube threads when torquing the castle nut.

Does anyone know of a tool that won't chew up the buffer tube threads? Hopefully, at a reasonable cost.

 

oldrifleman

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#2

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I use a Midwest industries AR Professional Armorer's Wrench from Brownells. Works well

 

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Laseredge

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I use the Magpul Armourers Wrench, it works well.

 

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roostercogburn98

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#4

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I’ve used a standard armorers wrench for at least 10 years and never messed up threads.

 

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strikeeagle1

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#5

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Before assigning blame to the castle nut tool you should check buffer tube thread classification 1A/2A / 3A that would be matching the internal B class of threads for the castle nut being used.

 

FredHammer

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#6

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Used this kind for many years:

The Outdoor Connection Buffer Tube Nut Wrench

The Outdoor Connection Buffer Tube Nut Wrench allows easy removal or installation of buffer tube castle nuts. A soft rubberized handle provides a no-slip grip. SCHEELS

www.scheels.com

 

mark5pt56

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#7

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The Magpul one is nice from the standpoint of encircling the castle nut to minimize slipping. Also, when using any tool on it, "anchor" the tool by exerting force forward to keep it engaged in the slots.

 

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chevy_man

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#8

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Laseredge said:

I use the Magpul Armourers Wrench, it works well.

Click to expand...

What's been hanging over my bench for 10 years now. It just works.

 

hkguns

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Sep 22, 2024

#9

• Sep 22, 2024

• #9

I own several and the Midwest Industries wrench works best.

More importantly, how are you securing the lower? The NCStar Lower vise block is a great and inexpensive way to secure the lower while using the wrench.

 

buyobuyo

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Apr 14, 2010

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Camden, AR

Sep 22, 2024

#10

• Sep 22, 2024

• #10

hkguns said:

I own several and the Midwest Industries wrench works best.

More importantly, how are you securing the lower? The NCStar Lower vise block is a great and inexpensive way to secure the lower while using the wrench.

Click to expand...

I was using the NCStar tool that aligns the buffer tube on the last two that I was rebuilding when I remade this thread. In the past, I've just used a mag well vise block.

 

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