Joint Castle nut Wrench

Your Price: $35.00
In Stock.
Part Number:JCW

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JCW (Joint Castle nut Wrench) is a dedicated, heavy duty twin castle nut wrench, precision CNC machined from 4140 steel, heat treated and black oxided, it's something we've always wanted and needed.  We couldn't find one we liked, so we answered our own prayers and made it.

Like many AR users, we used either a heavy and unwieldy armoror's wrench, or a cheap stamped sheet metal castle nut wench that couldn't be used with a torque wrench, both work, but neither is great.  One is overkill, the other is barely adequate.

The handy JCW combines two castle nut wrenches in one.  On one end, it has a conventional 3 lug castle nut wrench, spanning 180 degrees.  On the other end, it has a unique two lugs wrench, spaced only 90 degrees apart.  JCW measures 3.5"x 1.84" (at its widest), but is surprising heavy at 3.14oz, due to its 4140 steel construction.  JCW was designed from the start to be used with a torque wrench.

On some end plates with QD swivel sockets, the sockets housing masks a good portion of the castle nut's circumference, and there are occasions where not all 3 wrench notches are accessible.  Our own ESF (End plate, Sling adapter, Forward Controls) covers up 1/4 of the castle nut's circumference (ESF's QD swivel housing acts as a backdrop to ensure it won't bend under unforeseen pulling force)  JCW's 2 lug wrench is designed specifically for this task.

JCW has a center socket for use with a torque wrench (1/2" drive).  TM calls for 38 to 42 ft/Lb of torque to be applied to the castle nut prior to staking in two places, this torque value is conveniently engraved on the JCW as well.

JCW, like CBW (Combined Barrel nut Wrench) and JMW (Joint Muzzle device Wrench) requires a torque wrench with 1/2" drive.

JCW is proudly designed and made in the US, it is a collaboration between Forward Controls Design and Arson Machine Co, OR.

RE: torque value, it is 38 to 42 ft lb, with no adjustment needed for the 1" of length between the center of the 1/2 drive and the lugs.  Our good friend Chad Albreach of SOTAR (School of the American Rifle) has stated thus:
The USGI Castle Nut Wrench has the same distance from the wrench surface to the 1/2 adaptor as the FCD wrench does. The military technical manuals take into account the extra length the USGI tools have when coming to the 38-42 FT# value.

5 Stars
very nice tool. compact, nice finish, heavy. perfect fit on castle nut. should last a lifetime
Did you find this helpful?  4 of 6 Found Helpful
Reviewed by:  from Johnstown PA. on 12/3/2019
5 Stars
RN, Combat Flight Medic
Excellent tool. You need to have this wrench in your tool box. Perfect for any one, from novice to expert. Had a very stubborn castle nut and this tool did an excellent job in removing the bastard nut. Don't hesitate in getting this wrench, it's worth every penny.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by: (Verified Buyer)  from Mickey Mouse Land. on 4/28/2020
5 Stars
Irreplaceable Tool
I run Troy Industry QD End Plates on all my guns, and it was impossible to access all 3 notches on my castle nut. That had become such a problem that I was about to swap out all my End Plates. That’s when I discovered this tool, and now I don’t have to. I’m beyond grateful for this tool. Nobody else makes one.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by: (Verified Buyer)  from Alpharetta, GA. on 1/7/2021
5 Stars
This is what you're looking for
I've always had a heck of a time trying to get up to 40 ftlbs with various AR wrenches in combination with a torque wrench. I've deformed so many castle nuts I probably have one for each finger. Granted some part operator error but mostly not having the right tools for the job!! This wrench with a sold buffer tube isolating/vice tool are heaven. Torque with confidence, no deformation, so smooth and easy it was hard to believe. Well worth the money even if your torquing one castle nut. Now on to staking!!
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Reviewed by:  from Behind The Iron Curtain. on 11/1/2021
5 Stars
Wow. This is an awesome addition to my tool kit. Great finish, quality, and most surprisingly, received it quickly via USPS which is unheard of in my area. Simple, high quality product that works as intended.
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Reviewed by:  from Macomb. on 2/17/2021
5 Stars
The simplicity in this tool’s design speaks to the countless hours spent in its design and testing. It grabs castle nuts solidly and securely, without a large and unnecessary wrench handle getting in the way.
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Reviewed by:  from TX. on 9/30/2020

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