Stock for a small arms weapon, recoil reduction system, and method

1 . A stock for a small arms weapon comprising:

a stock body including a first longitudinal axis, the stock body comprising

a proximal end,

a distal end spaced from the proximal end along the first longitudinal axis,

a receptacle open to the distal end for receiving a receiver extension,

a duct spaced from the receptacle, the duct being aligned with the longitudinal axis,

a slot extending from the duct to the receptacle,

an aft fastener receiving hole adjacent to the proximal end, and

an inferior fastener receiving hole spaced from the aft fastener receiving hole;

a block disposed in the duct, the block comprising an upper surface, a lower surface, a countersunk bore extending from the upper surface to the lower surface, and a first one-eye end adjacent to the upper surface and the lower surface;

a latch bolt received in the countersunk bore, the latch bolt being arranged through the slot and extending into the receptacle;

a link which comprises a proximal two-eye end and a distal two-eye end, the distal two-eye end being pivotably connected to the first one-eye end by a first fastener to form a distal joint;

a rocker which comprises

a proximal side comprising a plurality of eyes, and

a distal side which comprises a superior eye and an inferior eye, the superior eye being pivotably connected to the proximal two-eye end by a second fastener to form a proximal joint, and the inferior eye being pivotably connected to the inferior fastener receiving hole by a third fastener to form an inferior joint;

a strut insert comprising an aft one-eye end, a spring guide adjacent to the aft one-eye end, and a first bore extending through the spring guide, the aft one-eye end being pivotably connected to the aft fastener receiving hole by a fourth fastener to form a rear joint;

a strut mount comprising a fore two-eye end, the fore two-eye end being pivotably connected to one of the plurality of eyes by a fifth fastener to form a front joint;

a longitudinal fastener arranged in the first bore and secured to the strut mount; and

a spring between the aft one-eye end and the fore two-eye end.

2 . The stock of claim 1 , wherein the strut mount further comprises:

a fore spring seat adjacent to the fore two-eye end, the fore spring seat comprising a second countersunk bore, and

a nut which comprises a first screw thread, the nut being disposed in the second countersunk bore,

wherein the longitudinal fastener further comprises a second screw thread, the second screw thread being configured and dimensioned to mate with the first screw thread to connect the longitudinal fastener to the strut mount.

3 . The stock of claim 1 , wherein the spring is arranged about the spring guide.

4 . The stock of claim 1 , wherein the spring has a non-circular cross section.

5 . The stock of claim 4 , wherein the non-circular cross section is rectangular and comprises a width and a height, and the width of the rectangular cross section measures about 3.1 mm and the height of the rectangular cross section measures about 2.5 mm.

6 . The stock of claim 1 , wherein the spring possesses a spring constant ranging from 33 N/mm to 41 N/mm.

7 . The stock of claim 6 , wherein the spring constant is approximately 37.1 N/mm.

8 . The stock of claim 7 , wherein the spring has a free length of about 51 mm and a solid height of about 32 mm.

9 . The stock of claim 1 , wherein the spring has a ready working length of approximately 50 mm and a reduced working length of approximately 32 mm.

10 . The stock of claim 1 , wherein the spring has a ready working length of approximately 50 mm and a reduced working length of approximately 36.

11 . The stock of claim 1 , wherein the spring has a ready working length of approximately 48 mm and a reduced working length of approximately 38.

12 . The stock of claim 1 , wherein the plurality of eyes on the proximal side of the rocker comprises a superior proximal eye, an intermediate proximal eye, and an inferior proximal eye.

13 . The stock of claim 12 , wherein the strut mount is selectively arranged in one of a plurality of operational modes comprising

a first operational mode which comprises a first ready state in which the fore two-eye end of the strut mount is connected to the superior proximal eye;

a second operational mode which comprises a second ready state in which the fore two-eye end of the strut mount is connected to the intermediate proximal eye; and

a third operational mode which comprises a third ready state in which the fore two-eye end of the strut mount is connected to the inferior proximal eye.

14 . The stock of claim 13 , wherein the first operational mode provides a first level of recoil reduction, the second operational mode provides a second level of recoil reduction, and the third operational mode provides a third level of recoil reduction.

15 . The stock of claim 14 , wherein the third level of recoil reduction is greater than the second level of recoil reduction, and the second level of recoil reduction is greater than the first level of recoil reduction.

16 . The stock of claim 1 , further comprising a second spring disposed in the countersunk bore, the latch bolt being arranged through the second spring.

17 . A method of reducing recoil from a firearm having a receiver extension comprising:

providing a stock of claim 1 ;

securing the receiver extension in the receptacle;

connecting the strut mount to one of the plurality of eyes;

generating recoil by discharging the firearm;

transferring recoil from the receiver extension to the latch pin;

moving the latch pin, block, link, and rocker to compress the spring; and

expanding the spring to bias the rocker, link, block, and latch pin toward the distal end of the stock body.