A universally adjustable firearm stock is provided having adjustments for comb, cast, length of pull and butt pad height. The stock has an adapter (receiver model specific) to connect a frame to the receiver. An end of a mount passes through a slot through a frame seat. A cast piece is received within the seat and has a cast hole (center hole—no cast, offset hole—cast). The rearward extending end of the mount passes through the cast hole, wherein any offset in the cast hole results in an angular cast. The comb is vertically adjustable relative to the frame. Two rods are extendable relative to the frame to adjust the length of pull. A butt plate has two slots wherein the height of a butt pad relative to the rods is adjustable.