Modular gunstock

• US 6,874,267 B2
• Filed: 05/27/2003
• Issued: 04/05/2005
• Est. Priority Date: 06/25/2001
• Status: Expired due to Fees

• Current Assignee: Magpul Industries
• Original Assignee: Richard Mark Fitzpatrick, Stephen Charles Hines
• Inventors: Fitzpatrick, Richard Mark, Hines, Stephen Charles
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): RICHARDSON, JOHN A
• Application Number:
  US10/446,383
• Publication Number:
  US 20040016167A1
• Time in Patent Office: 679 Days
• Field of Search: 42/710.1, 42/72, 42/73, 42/74, 42/750.1, 42/750.3, 42/77, 42/710.3, 89/430.1, 89/440.1, 89/440.2, 891/98
• US Class Current: 42/72
• CPC Class Codes: F41C 23/04 Folding or telescopic stocks or stock parts articulated or collapsible guns F41A11/04
• CPC Class Codes: F41C 23/14 Adjustable stock or stock parts, i.e. adaptable to personal requirements, e.g. length, pitch, cast or drop
• CPC Class Codes: F41C 23/20 Butts; Butt plates; Mountings therefor F41C23/08, F41C23/10, F41C23/14 take precedence

Abstract

The present invention is a modular stock system for rifles. The system replaces the rifle'"'"'s buffer tube with a modified one containing a mount for a constant cheek weld and a rail track for adjustment. A stock module then mounts on the replacement buffer tube. The stock module is interchangeable depending on the user'"'"'s needs. Various configurations of the stock module are discussed, including adjustable stocks, fixed stocks, and specialized stocks. The stock module may be made even further modular by the addition of rail system.

Claims

1. A modular stock system for a rifle comprising:

a. a replacement buffer tube module having upper and lower sides, the downward side being disposed towards the ground, said tube module having attachment means and a cheek plate; and

b. a replaceable stock module attachable to the buffer tube module and being selectable from a group of assorted hind segments adapted to different functions, said stock module further comprising;

i. a receiving interface;

ii. a receiving means for attachment of the stock module to the buffer tube module via the buffer tube module'"'"'s attachment means; and

iii. a stock portion, disposed in a rearward direction relative to the receiving means;

wherein the stock module mounts on the buffer tube module in a manner that leaves the cheek plate exposed for use.

2. The modular stock system of claim 1, the attachment means of the buffer tube module further comprising two parallel rows of tooth interfaces, disposed on opposite lateral sides and the stock module'"'"'s attachment means further comprises a compression latch mechanism, the mechanism comprising:

a. At least one bicuspid tooth, with sufficient width to interface with tooth interfaces on opposite sides of the buffer tube module

b. a mechanism for displacement of the tooth;

c. a mechanism actuator;

wherein, the actuator may be used to bias the tooth into and out of the tooth interfaces and therefore lock the stock module into a position relative to the buffer tube module.

3. The modular stock system of claim 2 wherein the at least one tooth and tooth interfaces are disposed at complimentary angles to one another, and the mechanism primarily displaces the tooth in an angular manner, thereby allowing unilateral motion of the stock module relative to the buffer tube module when the latch is simultaneously engaged.

4. The modular stock system of claim 3, the mechanism of which further comprising a cam anchor that is vertically displaced into the rail track of the buffer tube module when the actuator is moved into a locked position.

5. The modular stock system of claim 4, the mechanism of which further comprises a safety latch, designed to releasably interface with the stock module when the actuator is moved into a locked position, thereby arresting motion of the actuator and associated mechanism.

6. The modular stock system of claim 3, the buffer tube module further comprising an adjustment rail track, located underneath the buffer tube module and the stock module further comprises an interface for interaction with the rail track.

7. The modular stock system of claim 6, the system further comprising a clip and the rail track further comprises a groove transecting the entire length of the rail track, wherein the clip is insertable into a portion of the transecting groove so as to provide a pre-set stop for a longitudinally adjustable hind segment.

8. The modular stock system of claim 6 further comprising a pre-set stopping system for an adjustable for length stock attachment, the system further comprising:

a. A longitudinal channel transacting the length of the rail track;

b. A preset latch located in the stock module so as to interface with the channel, the preset latch having a tooth capable of horizontal motion relative to the stock module within the channel;

c. At least one spring to bias the tooth in a central orientation;

d. A clip, insertable within the rail track, having a horizontal groove which is partially blocked by a body, leaving enough space for the tooth to pass through when said tooth would be biased to one side;

wherein, when the clip is inserted into the rail track the groove aligns with the channel and is capable of interfacing with the tooth during longitudinal motion of the stock module relative to the buffer tube module, said tooth capable of bypassing the clip when biased to one side, but may not pass the clip otherwise.

9. The modular stock system of claim 8, the body blocking the groove shaped at an angle in one direction, wherein the stock module is then capable of bypassing the clip in one direction, but not the other without biasing the tooth.

10. The modular stock system of claim 9, the attachment means further comprising a clipping means and at least one bole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

11. The modular stock system of claim 8, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

12. The modular stock system of claim 7, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding bole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

13. The modular stock system of claim 6, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

14. The modular stock system of claim 5, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

15. The modular stock system of claim 4, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

16. The modular stock system of claim 3, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

17. The modular stock system of claim 2, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

18. The modular stock system of claim 1, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s boles when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.

19. The modular stock system of claim 1, the attachment means further comprising a clipping means and at least one hole capable of receiving a clipping means built into the buffer tube and at least one corresponding hole located on the hind segment in a manner to juxtapose the buffer tube and segment'"'"'s holes when the hind segment is appropriately positioned on the buffer tube wherein the clipping means may be inserted through the holes and thus secure the hind segment to the buffer tube.