How many of you have used a substandard tool or improvised during a build? Just about everyone has put together a lower at some point. Doing it without the proper tools can damage parts and lead to bad installs. Many multitools or armorer's wrenches come with a castle nut tool, but many are poor quality or poorly designed. This single purpose wrench is durable steel and accepts 1/2" and 3/8" handles, ratchets, or torque wrenches. A perfect addition to your toolbox.
Have you ever seen an unstaked castle nut come loose out in the field? If the castle nut comes loose and the buffer tube rotates, it can let the buffer retainer and spring get into the action shutting the gun down by jamming the trigger group or bolt carrier. Not everyone has an armorer's wrench with them at all times. But at less than 3.5" and under 7 ounces, this wrench can easily be tossing into the range bag for field repairs. Stay prepared for emergency maintenance with solid tools like the AR-15 Crows Foot wrench in you gear.
Knights Armament (KAC)
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