Barrel Nut Torq Wrench for DPMS & KAC Rifles. This wrench allows the shooter to put the exact amount of pressure needed on the barrel nut while attaching the barrel to the receiver. Constructed of 3/8 high steel with 4 lugs on each side to accommodate the DPMS and KAC Barrel Nuts. Works with any 3/8 or A 1/2 drive torque wrench. This wrench is for 24-tooth free float barrel nuts. Mfg: Precision Reflex SPECS: Weight - .525 lbs. Fits DPMS, R-25, Knights barrel nut patterns in .308.