Gas piston system for M16/AR15 rifle or M4 carbine systems
OwnerLawrence S. Kramerinventor
Life of this patent
Estimating the term…
Abstract
A gas piston system for a firearm includes a gas block having a port in communication with the barrel port and an exhaust tube. The exhaust tube has: a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port; a body extending from the head toward a muzzle of the firearm; and a channel extending from the exhaust tube port through the body. The gas piston system further includes a driver movable relative to the gas block between a forward and rearward position and having: a piston slidable along the gas block; a stinger closing the channel in the forward position and opening the channel in the rearward position, and an operating rod operable to push the bolt carrier assembly away from the barrel.
Claims15
A firearm, comprising:
- a barrel having a port formed through a wall thereof;
- a bolt carrier assembly operable to:
- transport a cartridge from a magazine to the barrel, and
- eject the spent cartridge from the barrel;
- and
- a gas piston system comprising:
- a gas block having a port in communication with the barrel port;
- an exhaust tube having:
- a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port;
- a body extending from the head toward a muzzle of the firearm;
- and
- a channel extending from the exhaust tube port through the body;
- and
- a driver movable relative to the gas block between a forward and rearward position and having:
- a piston slidable along the gas block;
- a stinger closing the channel in the forward position and opening the channel in the rearward position, and
- an operating rod operable to push the bolt carrier assembly away from the barrel,
- wherein:
- the gas block is fastened to the barrel,
- the exhaust tube further has a shoe having a coupling, and
- the gas piston system further comprises an exhaust block fastened to the barrel and having a coupling engaged with the shoe coupling.
A gas piston system comprising:
- a gas block for mounting to a barrel of a firearm and having a port for communication with a port of the barrel;
- an exhaust tube having:
- a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port;
- a body extending from the head to a shoe;
- the shoe having a coupling;
- and
- a channel extending from the exhaust tube port through the body and the shoe;
- an exhaust block for mounting to the barrel and having a coupling engaged with the shoe coupling;
- a driver movable relative to the gas block between a forward and rearward position and having:
- a piston slidable along the gas block;
- a stinger closing the channel in the forward position and opening the channel in the rearward position, and
- an operating rod for extending to a bolt carrier assembly of the firearm;
- and
- a gas chamber formed in the gas block between the piston and the head.
A firearm, comprising:
- a barrel having a port formed through a wall thereof;
- a bolt carrier assembly operable to:
- transport a cartridge from a magazine to the barrel, and
- eject the spent cartridge from the barrel;
- and
- a gas piston system comprising:
- a gas block having a port in communication with the barrel port;
- an exhaust tube having:
- a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port;
- a body extending from the head toward a muzzle of the firearm;
- and
- a channel extending from the exhaust tube port through the body;
- and
- a driver movable relative to the gas block between a forward and rearward position and having:
- a piston slidable along the gas block;
- a stinger closing the channel in the forward position and opening the channel in the rearward position, and
- an operating rod operable to push the bolt carrier assembly away from the barrel,
- wherein:
- the driver further has a hilt formed at an interface of the piston and the stinger,
- the hilt has a recess forming a portion of a gas chamber, and
- the exhaust head has a conical inner surface forming another portion of the gas chamber.
Dependencies are inferred from the claim text.