NcSTAR AR-15 Crows Foot Barrel Tool Features The NcSTAR AR-15 Crows Foot Barrel Tool is built from steel to withstand the torque loads required to properly seat a GI spec barrel nut during an AR-15 build. Its crows foot design fits over the barrel nut s flats allowing a torque wrench to apply even controlled force rather than relying on a hand wrench and guesswork. Compatibility with both 1/2 inch and 3/8 inch drive torque wrenches gives builders flexibility to use whichever torque wrench they already have in their toolbox. Proper torque on the barrel nut is critical to headspace gas system alignment and overall reliability of the completed upper. Finished in a matte black finish the tool resists corrosion and keeps a clean professional appearance in a range bag or tool kit. At 8.0 ounces the tool is light and compact enough to store alongside other AR-15 build tools without adding significant bulk. Steel construction gives the tool the durability needed to stand up to repeated use across multiple builds or armorer tasks. For builders and armorers looking to properly torque their AR-15 barrel nut every time this crows foot tool is available for sale at GrabAGun. NC Star AR-15 Crows Foot Barrel Tool Specifications Manufacturer: NC Star Model: AR-15 Crows Foot Barrel Tool Color: Black Material: Steel Compatible Hosts: AR-15 Barrel Nut Weight: 8.0 oz Available At: GrabAGun