Abstract: A substitute stock and trigger assembly for a gun of the rifle and shotgun type. The original stock is discarded and the substitute stock is mounted on the gun in lieu thereof. The substitute stock has a trigger member which is positioned a considerable distance in advance of the original trigger and immediately in front of a hand grip whereby a forefinger of the hand gripping the hand grip and supporting the gun may be utilized to actuate the trigger member. The trigger member is connected to the original trigger by a trigger assembly which includes, among other things, a pump piston and cylinder associated with the trigger member and an actuated piston and cylinder positioned adjacent the original trigger and engageable with a pivoted arm which engages the original trigger so as to effect the pushing of the original trigger to fire the gun.