Midwest Industries AR-15/M4 Stock Wrench

Manufactured by Midwest Industries
Manufactured by Midwest Industries
62 Reviews
Click Here for Price $11.96 $14.95

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



Midwest Industries is a quality manufacturer of tactical weapons accessories. Their goal is to manufacture the highest quality parts at affordable prices backed by a lifetime guarantee.

The AR-15/M4 Stock Wrench is perfect for tightening down the castle nut on your AR pattern rifle. Very well made and durable!
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BrandMidwest Industries
Manufacturer.Midwest Industries
TypeArmorers Wrench

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

simple, great price


simple, but effective.

Basic and straighforward


Straightforward, inexpensive all metal stock wrench. Does exactly what it's designed to do.

Great value


Sturdy construction and excellent value. I bought it to go along with my GI barrel wrench.

Solid Product


This is a great little tool. For the price, you can't find a better castle nut wrench. Shipping was fast as well. Made it to my home in 3 days.

Great wrench!


This is a great wrench, especially for the price. It did everything it claimed it would do. Great purchase I made with this tool.

Doesn't grip enough


This may "tighten" a castle nut to about as tight as a toddler can get it, but try using this to loosen a castle nut that was professionally tightened. It doesn't work because it simply doesn't grip enough with the 3 "teeth." They end up not fitting extremely tight enough, so then it slips & you scratch the heck out of your castle nut. Also, you NEED some winter gloves or something because it's skinny & cuts into your hand. Kudos to PA, though, for shipping this out to me in only 2 days!! Awesome company (PA)!

Works great


This wrench was just what I needed to install my spikes tactical buffer tube on my yankee hill lower. Fit the castle nut perfectly! Can't beat the price from primary arms with fast shipping! Thanks again primary arms

Good for unstaked nut


This wrench works just fine when the castle but you are working with is not staked. Lines up well with nut but easy to bend.

Right tool for the job


Totally easy than using my man hands to install a buffer tube.

Stock wrench


Well made with good fit.The stamped steel wrench has been de-burred and leaves no marks on the nut.