US Patent 9827433 Buttstock

A buttstock includes a main body and a protecting member. The main body includes a shell member and an automated external defibrillator disposed in the shell member. The protecting member is movably connecting with the shell member of the main body so as to move relative to the shell member between a first position and a second position, wherein the protecting member shields the automated external defibrillator at the first position and exposes the automated external defibrillator at the second position respectively.