Recoil absorbing stock
View Patent ↗A recoil absorption system for a long gun is provided that includes at least one fluid-filled piston shock attached between the body of the rifle and the stock to provide a damped connection between the two. When large caliber rounds are fired, the shocks are permitted to compress, so that the buffer tube is correspondingly permitted to travel rearward within the buffer tube bore of the stock. The stocks detent pin is normally captured within a slot on the buffer tube, such that the long gun recoil causes the buffer tube slot to move relative to the pin, the pin restricts the buffer tube movement and compression of the shocks to the length of the slot. In this way, the recoil energy of large caliber rounds is effectively absorbed, providing a more comfortable and accurate shooting experience.
1. A recoil absorption system for a long gun having a receiver and a buffer tube with a buffer tube axis, a detent slot, and at least one detent hole located at a slot bottom of the detent slot, comprising:
a buffer tube insert configured to fit within the detent slot of the buffer tube to cover at least one detent hole;
a stock with a buffer tube bore configured to receive there within the buffer tube, the stock configured to slide along the buffer tube axis, and a detent pin extending transversely into the buffer tube bore and biased into the detent slot when the buffer tube is inserted into the buffer tube bore; and
a shock absorber with a first end secured to the stock and a second end connected with a receiver, the shock absorber biasing the stock away from a receiver when under compression and providing recoil absorption through compression of the shock absorber;
wherein the buffer tube insert prevents the detent pin from engaging the detent hole, the buffer tube insert positioned within the detent slot providing a bounded area through which the detent pin is restricted to travel as the stock axially slides along the buffer tube axis, the travel of the detent pin limiting the resulting travel of the stock relative to the buffer tube wherein the bounded area provided by the buffer tube insert within the detent slot is divided into at least two sub-bounded areas which are smaller than the bounded area, when the detent pin is positioned within a first sub-bounded area it is permitted to slide only along the first sub-bounded area and when the detent pin is positioned within a second sub-bounded area it is permitted to slide only along the second sub-bounded area.
2. The recoil absorption system of claim 1 wherein the buffer tube insert is divided into the sub-bounded areas by protrusions extending from a top surface of the buffer tube insert.
3. The recoil absorption system of claim 1 wherein the stock further comprises a shock absorber bore configured to receive the first end of the shock absorber.
4. The recoil absorption system of claim 3 wherein the first end of the shock absorber is a cylinder and the second end is a rod, the shock absorber bore sized to receive a substantial portion of the cylinder.
5. The recoil absorption system of claim 4 wherein the cylinder includes an end thread that threadably engages a bottom of the shock absorber bore.
6. The recoil absorption system of claim 1 wherein the stock further comprises a shock absorber bore configured to receive the first end of the shock absorber, the second end of the shock absorber is connected with a receiver through an end plate.
7. The recoil absorption system of claim 6 wherein the first end of the shock absorber is a cylinder and the second end is a rod, shock absorber bore configured to receive the cylinder.
8. The recoil absorption system of claim 1 wherein two shock absorbers provide recoil absorption, the shock absorbers being positioned externally to the buffer tube and alongside the buffer tube, such that compression of the shock absorbers is parallel to the buffer tube axis.