Magpul AR-15 armourer's wrench

This is the AR-15 master key par excellence. It allows working on barrel nuts, castle nuts and receivers extensions (buffer tube). It also has two hammer faces and a bottle opener built into it.

The tool is best used in conjunction with a torque wrench. Milspec AR-15 torque values conveniently figure on the body of the tool. Please note that your weapon’s specs might differ. Always revert to manufacturer-provided torque specs.

Made of heat-treated steel with phosphate finish. The body and teeth of this tool are able to withstand a massive amount of work without breaking.