The Midwest Industries AR-15 Stock Wrench (Midwest Industries part no. MI-ESW) is a steel armorer’s tool built to fit the castle nut on the rear of an AR-15 buffer tube, letting a builder install or remove a stock without marring the finish the way an improvised tool can. The wrench also accepts a 1/2-inch torque wrench, so the castle nut can be brought to the correct torque spec instead of guessing by feel. Midwest Industries builds the tool from steel for durability on a bench that sees repeated use, and the wrench is made in the USA. Per the manufacturer, this item is not shipped directly to California.

Key Specifications

• Measures 10.85 inches long, sized for solid leverage on the castle nut.
• Built from steel for durability under repeated bench use.
• Fits the AR-15 castle nut on the rear of the buffer tube.
• Accepts a 1/2-inch torque wrench for properly torquing the castle nut.
• Not available for direct shipment to California, per manufacturer policy.

Frequently Asked Questions

Can this wrench be used with a torque wrench? Yes, it accepts a 1/2-inch torque wrench so the castle nut can be tightened to the correct spec.

Will this ship to a California address? No, the manufacturer does not permit direct shipment of this item to California.

Buy the Midwest Industries AR-15 Stock Wrench

Install or remove an AR-15 stock correctly instead of relying on an improvised tool. Browse more gunsmithing tools and supplies from Midwest Industries, and order from our Lubbock, Texas gun shop for fast shipping.