Anti-recoil arrangement

A firearm comprising:

• a wooden stock,
• a receiver mounted in said stock,
• a bolt mounted in said receiver for longitudinal movement,
• a barrel mounted on said receiver to extend forwardly thereof,
• said barrel having a rear end, a muzzle end and an axis extending from said rear end to said muzzle end along the direction of movement of said bolt,
• said barrel having a chamber at its rear end near where it is mounted on said receiver,
• said chamber being coaxial with said barrel axis,
• said barrel having a bore extending from said chamber coaxially with said barrel axis to said muzzle end,
• an unfired cartridge with a bullet attached thereto,
• said unfired cartridge being in said chamber and said bullet attached thereto being in said bore defining the rest position of said bullet,
• two cylinders placed on said barrel near said rest position of said bullet,
• said two cylinders each having an axis parallel to said barrel axis,
• passages connecting said bore of said barrel to said cylinders to conduct gas generated upon discharge of said unfired cartridge to each of said two cylinders,
• a movable housing having rearward and forward ends and mounted coaxially with said barrel and slidable along said barrel,
• two pistons,
• means attaching said two pistons to said housing near the rearward end thereof to be coaxial with said two cylinders,
• a first spring biasing said housing such that said two pistons are biased toward said rest position,
• whereby, discharge of said unfired cartridge produces gas which propels said bullet through said bore beyond said muzzle causing recoil and a portion of such gas is conducted through said passages to said two cylinders to force said two pistons and said movable housing attached thereto towards the rear,
• said movable housing sliding rearwardly along the barrel to counter the recoil,
• bumpers near the rear end of said barrel and the rearward end of said housing to stop rearward sliding of said housing along said barrel after discharge of said unfired cartridge and after said bullet leaves said muzzle of said barrel,
• a muzzle-brake threaded on the forward end of said housing to counter the recoil,
• a connecting ear attached to said housing between said forward and rearward ends,
• a tripod connected to said connecting ear,
• said tripod including a slider connected to said connecting ear and movable along an axis parallel to said barrel axis from forward position to a rearward position in response to recoil produced by discharge of said unfired cartridge,
• said tripod including second spring means biasing said slider toward its forward position,
• said tripod including screws to adjust the forward position of said slider,
• said tripod including a horizontal pin transverse to said barrel axis about which said slider pivots to allow aiming of the firearm in vertical plane, and
• said tripod including a vertical pin transverse to said barrel axis about which said slider pivots to allow aiming of the firearm in a horizontal plane.