1891. Cent. Dict., Tip-stock, the movable tip or fore end of a gunstock, situated under the barrel or barrels, especially when it is a separate piece, in front of the breech or trigger-guard. A hinged or detachable tip-stock is required for breech-loaders which break in the vertical plane.
1895. Funks Standard Dict., s.v. Tip1, v., Tip-stock, a gunstock arranged to hinge or tip, as for convenience in loading.