This is one for anyone that shoots a AR15/M16/M-4 clone.
Hammerhead Stock Tool will tighten/remove castle nut on mil-spec and commercial stocks
Tighten and remove A--2 style stock receiver extension tube.
3/4 Flash Hider Wrench
3/8 Torque Wrench hole
These cost $51.00 plus shipping, duty & VAT
HammerHead Rifle Tool - Bites Hard, Holds Hard