Forward Controls Design Joint Castle Nut Wrench

Manufactured by Forward Controls Design
Manufactured by Forward Controls Design
3 Reviews

In Stock

Standard orders will ship out within 1 business day 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.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. Click here for details



No need for a heavy duty armorer's wrench or to break yet another flimsy sheet metal so-called stock wrench. The Joint Castle Nut Wrench from Forward Controls Design is not just built to last from 4140 chrome moly steel, it features exactly what you need in a wrench with no extra nonsense you aren't going to use. For most jobs, the 3-prong side is just what you're looking for, offering the security and strength you need to properly torque your castle nut. For rifles with QD end plates, you can often only reach two of the lugs to tighten it down, which is where the 2-prong side comes into play, ensuring you have the purchase you need without having to cludge a solution together. Compatible with common torque wrenches to optimal installation, the JCW is exactly what you need in your tool box.

  • Heavy duty 4140 Chrome Moly steel
  • Properly heat treated for durability
  • Designed for use with a torque wrench
  • 3-prong wrench for standard installation
  • 2-prong wrench for crowded installation
  • Proper torque spec engraved in two places

Forward Controls Design firmly believes in the elegance of simplicity. Not content to produce purely aesthetic components, they put function before form to create parts and accessories that actually improve the handling and function of your firearms. When you need parts that just work without complication, you need Forward Controls Design.
See More


BrandForward Controls Design
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

3 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Outstanding function


Eliminates almost every other wrench I’ve used. Better grip so no more damaged castle nuts, and I appreciate the torque spec on the tool. Both ends have proven useful - 2-prong for the FCD and other raised end plates with qd sockets like POF, the 3-prong end for all standard end plates. Home run part.

Don't skimp on tools... wish I had purchased this first.

by -

After using one of the affordable multi-tools to assemble a couple of lowers (like walking a tight-rope), I chipped 2 castle nuts in a row with it. This tool seated in the buffer tube castle nut very square and there was no hint of it slipping out during the torque process. It's a quality hardened steel product with torque values displayed for easy reference.<br>Purchase with confidence.

Great tool and very heavy duty


Great cool very heavy duty. Will outlast any of the non metal couterparts.