Product Details
The Magpul Armorer's Wrench – AR15/M4 is an American-made, solid steel tool with grip-enhancing phosphate finish that engages both stock and pin-style barrel nuts. Fits standard sized flash hiders. Installs and removes rifle receiver extensions and carbine castle nuts, and has extended teeth for use with ASAP plates. Includes two hammer faces. 
The Magpul Armorer's Wrench works with a 1/2" torque wrench, and relevant torque specifications are included on the tool for quick reference. Convenient Bottle Opener for refreshments after the build is complete (fits both Metric and SAE bottle caps).
Made in the USA.
 
Technical Specifications
More Information
Weight
1.1 lb.
Other Specs
Handle Thickness: 0.35 in.
Length, maximum: 11.7 in.
COMPATIBILITY 
USGI barrel nut wrench
Free-float tube barrel nut wrench
1/2" torque wrench/breaker bar interface
Armorer's hammer
USGI castle nut wrench*, usable with aftermarket end plates such as the ASAP® and ASAP®-QD
3/4" wrench for most flash hiders/muzzle brakes
NOTE: Not compatible with larger pistol-style receiver extension tubes