IP Library Granted Patent US 12,742,604
Granted Patent B2
US 12,742,604 · App. 18/988,142 · Granted Sep 22, 2026

Firearm magazine assemblies

Inventors: James Matthew Underwood (Kennesaw, GA); Salvador Ochoa (Powder Springs, GA); Larry Cullen Underwood (Canton, GA)
F41A9/70
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Quick Facts
Patent No.
US 12,742,604
App. No.
18/988,142
Granted
Sep 22, 2026
Kind
B2
Abstract

A magazine assembly includes a magazine body, a follower disposed at least partially within the magazine body, a spring disposed within the magazine body, a floorplate disposed at a lower end of the spring, and a baseplate attached to a lower end of the magazine body. The magazine body includes an internal cavity for holding at least one cartridge such that a front to rear length of the internal cavity is approximately half of an overall front to rear length of the magazine body.

Claims (43)

1 . A magazine assembly comprising:

a magazine body;

a follower disposed at least partially within the magazine body;

a spring disposed within the magazine body;

an ejector;

a floorplate disposed at a lower end of the spring; and

a baseplate attached to a lower end of the magazine body, wherein:

the ejector comprises an insert protruding from a forward surface of the ejector; and

the magazine body comprises an internal cavity for holding at least one cartridge such that a front to rear length of the internal cavity is approximately half of an overall front to rear length of the magazine body.

2 . The magazine assembly of claim 1 , wherein the magazine body comprises a feed ramp near an upper end of the magazine body such that the feed ramp extends from a forward end of the internal cavity to the forwardmost portion of the magazine body.

3 . The magazine assembly of claim 2 , wherein at least a portion of the feed ramp comprises a curved and approximately conical shape.

4 . The magazine assembly of claim 1 , wherein the follower comprises an upper surface with a top portion and a bottom portion.

5 . The magazine assembly of claim 4 , wherein at least a part of the top portion comprises a convex shape.

6 . The magazine assembly of claim 1 , wherein the ejector extends up from a feed lip of the magazine body.

7 . The magazine assembly of claim 1 , wherein the ejector comprises an integral portion of the magazine body.

8 . The magazine assembly of claim 1 , wherein the insert of the ejector comprises at least one selected from the group consisting of a polymer material, a rubberized polymer material, a metallic material, or a hard polymer material.

9 . The magazine assembly of claim 1 , wherein the insert of the ejector is adjustable such that an offset from the ejector can change to adjust timing for ejection.

10 . A magazine assembly comprising:

a magazine body comprising a feed ramp;

a follower disposed at least partially within the magazine body;

a spring disposed within the magazine body;

an ejector;

a floorplate disposed at a lower end of the spring; and

a baseplate attached to a lower end of the magazine body, wherein:

the ejector comprises an insert protruding from a forward surface of the ejector; and

the feed ramp is disposed near an upper end of the magazine body such that the feed ramp comprises a front to rear length that is approximately half of an overall front to rear length of the magazine body.

11 . The magazine assembly of claim 10 , wherein at least a portion of the feed ramp comprises a curved and approximately conical shape.

12 . The magazine assembly of claim 10 , wherein the follower comprises an upper surface with a top portion and a bottom portion.

13 . The magazine assembly of claim 12 , wherein at least a part of the top portion comprises a convex shape.

14 . The magazine assembly of claim 10 , wherein the ejector extends up from a feed lip of the magazine body.

15 . The magazine assembly of claim 10 , wherein the ejector comprises an integral portion of the magazine body.

16 . The magazine assembly of claim 10 , wherein the of the ejector comprises at least one selected from the group consisting of a polymer material, a rubberized polymer material, a metallic material, or a hard polymer material.

17 . The magazine assembly of claim 10 , wherein the insert of the ejector is adjustable such that an offset from the ejector can change to adjust timing for ejection.

18 . A magazine assembly comprising:

a magazine body;

a follower disposed at least partially within the magazine body;

a spring disposed within the magazine body;

a floorplate disposed at a lower end of the spring; and

a baseplate attached to a lower end of the magazine body, wherein:

the magazine body comprises an ejector extending up from the magazine body; and

the ejector comprises an insert protruding from a forward surface of the ejector.

19 . The magazine assembly of claim 18 , wherein the ejector extends up from a feed lip of the magazine body.

20 . The magazine assembly of claim 18 , wherein the magazine body comprises an internal cavity for holding at least one cartridge such that a front to rear length of the internal cavity is approximately half of an overall front to rear length of the magazine body.

Continuity (2)
Provisional Application 63614003 · Dec 22, 2023
Related Publication 20250207881A1 · Jun 26, 2025
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