Hammerhead Rifle Tool 3/4 Flash hider wrench: (do not apply more than 10ft lb. of torque. Do not over torque) Patent Pending, Four-Point Castle Nut Wrench: (remove collapsible stock, slide down over buffer tube. Stabilize wrench by firmly grasping hammer head. Hand tighten or torque to recommended spec.) 3/8 torque drive socket: (Always start torque wrench perpendicular to hammerhead tool, tighten in small increments returning to start position between turns.) 5/8 A-2 style stock extension tube wrench Receiver take-down and pivot pin punch