Griffin Armament GACART Armorers Wrench 3/8" Drive 4140 Steel - Black Oxide

The Griffin Armament GACART Armorers Wrench is a purpose-built multi-tool for routine AR-pattern rifle service and Griffin Armament muzzle device installation. Cut from 4140 steel and hardened to 48 RC, the wrench is sized to handle the torque demands of gunsmithing without flexing or rounding off fasteners.

The body carries a black oxide and oil-dip finish for corrosion resistance, with a slim profile that drops into a range bag or tool drawer. A 3/8" drive tang accepts standard ratchets and driver handles for removing and installing Griffin muzzle devices, while integrated 3/4" and 5/8" open-end cutouts cover common castle nut and receiver extension flats.

A built-in 3-prong castle nut wrench at the opposite end lets you properly torque AR-15 castle nuts and compatible flash hiders, and a handy bottle opener finishes the tool for post-range use. The GACART is the single wrench needed to keep an AR build and a set of Griffin muzzle devices turning at the bench.