Patent ID: 8418592
Filing Date: 2013-04-16
Classification: A62B,B25D,F41C

Abstract:
1. A breeching tool comprising: a modified assault rifle lower having a magazine adapted to hold at least one round of blank ammunition and having the conventional butt-stock, buffer tube and recoil spring thereof removed; a firearm upper having a firing chamber and a barrel having a first end proximate the firing chamber and defining a piston stop and a second open end, the firearm upper mated with the modified assault rifle lower, the firearm upper also having a bolt carrier assembly moveable therein for transporting a round of blank ammunition from the magazine into the firing chamber and expelling a cartridge case of the round of blank ammunition after the ammunition is fired; a ram slidably disposed within the barrel and extending outwardly from the second end of said barrel; a piston slidably disposed within the barrel between the firing chamber and the ram and being moveable toward said second end of said barrel by cartridge gas pressure to strike and impart impact force to said ram; a pump handle slidably attached to the firearm upper and upon sliding movement toward said first end of said barrel causing sliding movement of said piston to a ready position within said barrel in engagement with said piston stop and in spaced relation with said ram; said bolt carrier assembly being moveable within said firearm upper for blank cartridge handling and having an operating rod connecting said bolt carrier assembly with said pump handle for operating movement of said bolt carrier assembly by manual movement of said pump handle; and wherein when the breeching tool is in a ready position, the ram and the piston are each disposed in spaced and moveable relation within said barrel with the piston engaging said piston stop, and the pump handle is manually slid back toward the firing chamber and then forward toward the second end of the barrel thereby transporting a round of blank ammunition from the magazine and into the firing chamber and expelling a cartridge case if present within the firing chamber and also resetting a trigger assembly of the breeching tool, so that when the trigger assembly is pulled, the round of blank ammunition within the firing chamber discharges thereby developing gas pressure accelerating the piston onto the ram causing the ram to accelerate partially out of the second end of the barrel and apply impact force to a selected object.