Granted Patent B2

US 12,698,946 · App. 19/159,678 · Granted Aug 4, 2026

Inventors: Robert Allan Ross (Golden, CO); Timothy Eric Roberts (Broomfield, CO)

Assignee: Magpul Industries Corp.

F41C23/14F41C23/04

Abstract

Claims (24)

1 . An adjustable stock assembly for a firearm, comprising:

a stock body configured to couple to a buffer tube of the firearm;

a tensioning mechanism within the stock body, comprising:

a tensioning body configured to couple to the stock body;

an indexing pin slidably arranged within an aperture in the tensioning body and having a first spring coupled within the indexing pin;

a first retaining pin coupled through a first set of apertures in the indexing pin and coupled through two additional apertures within the tensioning body, and wherein a first end of the first spring abuts to a bottom portion of the first retaining pin; and

a second retaining pin coupled through a second set of apertures in the indexing pin, wherein a second end of the first spring abuts to a top portion of the second retaining pin; and

a second spring coupled around the indexing pin between the tensioning body and the second retaining pin.

2 . The adjustable stock assembly of claim 1 , wherein the tensioning body has two fins extending from a top side of the tensioning body, thereby providing a u-shaped profile to the tensioning body.

3 . The adjustable stock assembly of claim 2 , wherein the two fins of the tensioning body are tapered.

4 . The adjustable stock assembly of claim 2 , wherein the two fins form a wedging friction fit engagement with a keyed extension of the buffer tube.

5 . The adjustable stock assembly of claim 1 , wherein the first retaining pin is actuated by a lever to retract the indexing pin from engagement with the buffer tube.

6 . The adjustable stock assembly of claim 1 , further comprising one or more stops within the buffer tube limiting movement of the indexing pin.

7 . The adjustable stock assembly of claim 1 , wherein the tensioning body and the indexing pin can move independently to accommodate tolerance differences between the stock body and the buffer tube.

8 . A method for installing an independently sprung tensioning mechanism in an adjustable stock assembly, comprising:

inserting an indexing pin through a first aperture in a tensioning body;

aligning a first pair of apertures in the indexing pin with a second pair of apertures in the tensioning body;

inserting a first retaining pin through the first and second pairs of apertures;

sliding a first spring into the indexing pin, wherein a first end of the first spring abuts against the first retaining pin;

inserting a second spring into a hollow in the tensioning body and around a portion of the indexing pin; and

compressing both springs to allow insertion of a second retaining pin through a second pair of apertures in the indexing pin.

9 . The method of claim 8 , further comprising coupling a first end of a lever between the first retaining pin and a keyed extension of a buffer tube by a friction fit.

10 . The method of claim 8 , further comprising coupling the tensioning body to a keyed extension of a buffer tube.

11 . The method of claim 8 , further comprising securing a cap to a bottom of an angled portion of a stock body to cover the independently sprung tensioning mechanism.

Continuity (2)

References Cited (116)