A gas-delayed blowback system for a firearm preferably includes a receiver, a barrel and a spring-loaded moveable slide. The barrel is ported to at least two gas compression chambers into which expanding propellant gases flow after the firearm is fired. The gas compression chambers and ports vary in volume such that propellant gas pressure increases rapidly in one of the chambers, thereby locking the slide upon firing. Pressure in the other gas compression chambers increases and decreases at a slower rate due to a smaller port size, further delaying rearward travel of the slide after the bullet exits the barrel and barrel pressure is relieved.

A recoil mitigation apparatus formed into a stock of a rifle, featuring a removable spring housed inside a spring chamber formed inside a pair of coaxial, telescoping tubes that slideably compress the spring when energy from a rifle is generated and transmitted to the stock and thus to the apparatus. The spring compresses, absorbing the energy and thus reducing energy transmission to the user's shoulder against which the butt end of the stock is positioned. The spring chamber and spring are accessible by removing an end cap of the apparatus located at a butt end of the stock using screw fasteners fastened into preexisting holes formed in the end cap. The spring is centered inside the spring chamber by insertion over the spring mount attached to the end cap facing inwards towards the spring chamber.

A recoil mitigation apparatus formed into a stock of a rifle, featuring a removable spring housed inside a spring chamber formed inside a pair of coaxial, telescoping tubes that slideably compress the spring when energy from a rifle is generated and transmitted to the stock and thus to the apparatus. The spring compresses, absorbing the energy and thus reducing energy transmission to the user's shoulder against which the butt end of the stock is positioned. The spring chamber and spring are accessible by removing an end cap of the apparatus located at a butt end of the stock using screw fasteners fastened into preexisting holes formed in the end cap. The spring is centered inside the spring chamber by insertion over the spring mount attached to the end cap facing inwards towards the spring chamber.

A recoil damping device for portable firearms, including a damping means inserted in the casing; a movable insert is functionally associated with the damping means and slide along a direction that is substantially axial with respect to the casing; the damping means is constituted by a body formed by a cellular solid having a stochastic structure, such as a foam, or having a nonstochastic structure, such as a reticular structure, lattice, etc.

A recoil damping device for portable firearms, including a damping means inserted in the casing; a movable insert is functionally associated with the damping means and slide along a direction that is substantially axial with respect to the casing; the damping means is constituted by a body formed by a cellular solid having a stochastic structure, such as a foam, or having a nonstochastic structure, such as a reticular structure, lattice, etc.

A firearm buffer includes a buffer casing having a casing chamber with open and closed ends, and buffer weight within the casing chamber. A buffer plug is received in the open end of the buffer casing. A cross pin extends through at least a portion of the buffer plug retaining the buffer plug on the buffer casing. A locking pin is longitudinally displaceable between a first position and a second position. In the first position, the locking pin is engaged with the cross pin and retains the cross pin in position with respect to the buffer plug. In the second position, the locking pin is disengaged from the cross pin such that the cross pin is removable from engagement with the buffer plug thereby permitting disassembly of the firearm buffer. A method of assembling a firearm buffer is also included.

A chassis includes an internal portion which corresponds to a rifle action of a first type. The chassis further includes an external portion which corresponds with a rifle stock. The chassis is attached to the rifle action of the first type and to rifle stock.

A buffer assembly is disclosed. The buffer assembly contains a buffer body, one or more magnets positioned along the buffer body, a hammer, a first spring, a spring guide, and an end cap removably coupled with the spring guide.

A buffer assembly is disclosed. The buffer assembly contains a buffer body, one or more magnets positioned along the buffer body, a hammer, a first spring, a spring guide, and an end cap removably coupled with the spring guide.

A firearm buffer includes a buffer casing having a casing chamber with open and closed ends, and buffer weight within the casing chamber. A buffer plug is received in the open end of the buffer casing. A cross pin extends through at least a portion of the buffer plug retaining the buffer plug on the buffer casing. A locking pin is longitudinally displaceable between a first position and a second position. In the first position, the locking pin is engaged with the cross pin and retains the cross pin in position with respect to the buffer plug. In the second position, the locking pin is disengaged from the cross pin such that the cross pin is removable from engagement with the buffer plug thereby permitting disassembly of the firearm buffer. A method of assembling a firearm buffer is also included.