IP Library Granted Patent US 10,072,903
Granted Patent B2
US 10,072,903 · App. 15/661,620 · Granted Sep 11, 2018

Ammunition magazine

Inventors: Richard M. Fitzpatrick (West Lake Hills, TX); Michael T. Mayberry (Denver, CO); Brian L. Nakayama (Arvada, CO); Eric C. Burt (Broomfield, CO)
Assignee: Magpul Industries Corp.
F41A9/70F41A9/65F41A9/62
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Quick Facts
Patent No.
US 10,072,903
App. No.
15/661,620
Granted
Sep 11, 2018
Kind
B2
Abstract

The present invention is an ammunition magazine, preferably made of a reinforced polymer, utilizing a structurally enhancing ridge, angular guide rails and a follower made to interface with said guide rails to reduce wobble. The preferred embodiment also features a protective cover that distributes forces from the spring to more structurally sound areas of the magazine, thus reducing feed end splay, and an ammunition indication system comprised of at least one window and a noticeable marker on the follower spring. The follower and magazine casing are also designed to interface to prevent the follower from popping out of the feed end and the floor plate of the magazine utilizes a locking plate and sliding relationship between the floor plate, locking plate and magazine to secure the floor plate onto the magazine casing. The cover features built in tools for, among other things, unloading and disassembling the magazine.

Claims (17)

1. An ammunition magazine comprising:

a casing with fore and aft sides and two longer lateral sides longer than the fore and aft sides and first and second open ends, the casing further comprising guide rails running along insides of the longer lateral sides, the casing further comprising a stop tab projecting internally from a front of the casing; and

a follower residing within the casing, said follower further comprising a follower platform with one to four tines, one of the one to four tines being at a fore position that extends generally perpendicularly from the follower platform, the guide rails contacting the follower to act as a guide for the follower, a groove serving as a detent situated in the follower platform to interface with the stop tab.

2. The ammunition magazine of claim 1 , wherein the casing further comprises a constant internal curve initiating at the second open end and continuing through a majority of the casing of the magazine.

3. The ammunition magazine of claim 2 , wherein one of the one to four tines is arranged at an aft position of the follower platform that extends generally perpendicularly from the follower platform.

4. The ammunition magazine of claim 2 , wherein the casing further comprises a ridge, centrally located on an interior side of the fore side, wherein a front face of one of the one to four tines presses against the ridge.

5. The ammunition magazine of claim 1 , wherein the casing further comprises a ridge, centrally located on an interior side of the fore side, wherein a front face of one of the one to four tines presses against the ridge.

6. The ammunition magazine of claim 1 , wherein one of the one to four tines is arranged at an aft position of the follower platform that extends generally perpendicularly from the follower platform.

7. The ammunition magazine of claim 1 , wherein the casing further comprises a ridge, centrally located on an interior side of the fore side, wherein a front face of one of the one to four tines presses against the ridge.

8. The ammunition magazine of claim 1 , wherein one or more of the one to four tines is split into two regions via a vertical gap arranged at a center of the one or more tines.

9. An ammunition magazine comprising:

a casing with fore and aft sides and two longer lateral sides longer than the fore and aft sides and first and second open ends, the casing further comprising guide rails running along insides of the longer lateral sides, the casing further comprising a constant internal curve initiating at the second open end and continuing through a majority of the casing of the magazine, and the casing further comprising a stop tab projecting internally from a front of the casing; and

a follower residing within the casing, said follower further comprising a follower platform with one to four tines, one of the one to four tines being at a fore position that extends generally perpendicularly from the follower platform, the guide rails contacting the follower to act as a guide for the follower, a groove serving as a detent situated in the follower platform to interface with the stop tab, thereby preventing the follower from exiting the magazine through the first end.

10. The ammunition magazine of claim 9 , wherein the follower platform comprises a second tine at an aft position of the follower that extends generally perpendicularly therefrom.

11. The ammunition magazine of claim 10 , wherein the casing further comprises a ridge, centrally located on an interior side of the fore side, wherein a front face of one of the one to four tines presses against the ridge.

12. The ammunition magazine of claim 9 , wherein the casing further comprises a ridge, centrally located on an interior side of the fore side, wherein a front face of one of the one to four tines presses against the ridge.

13. The ammunition magazine of claim 9 , wherein one or more of the one to four tines is split into two regions via a vertical gap arranged at a center of the one or more tines.

Assignments (5)
SECURITY INTEREST Recorded May 23, 2022
From: MAGPUL INDUSTRIES CORP.
To: U.S. BANK NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
Reel/Frame 061749/0859 →
RELEASE OF SECURITY INTEREST Recorded Mar 10, 2021
From: GLADSTONE CAPITAL CORPORATION
To: MAGPUL INDUSTRIES CORP.
Reel/Frame 055556/0782 →
SECURITY INTEREST Recorded May 1, 2020
From: MAGPUL INDUSTRIES CORP.
To: GLADSTONE CAPITAL CORPORATION, AS ADMINISTRATIVE AGENT
Reel/Frame 052554/0668 →
SECURITY INTEREST Recorded Feb 13, 2019
From: MAGPUL INDUSTRIES CORP.
To: SUNTRUST BANK
Reel/Frame 048328/0868 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2017
From: FITZPATRICK, RICHARD M.; MAYBERRY, MICHAEL T.; NAKAYAMA, BRIAN L.; BURT, ERIC C.
To: MAGPUL INDUSTRIES CORP.
Reel/Frame 043268/0106 →
Continuity (8)
Continuation 14632804 · Feb 26, 2015
Continuation 14461229 · Aug 15, 2014
Continuation In Part 14098467 · Dec 5, 2013
Continuation 13307431 · Nov 30, 2011
Continuation 12354766 · Jan 15, 2009
Continuation In Part 11958274 · Dec 17, 2007
Provisional Application 60941646 · Jun 1, 2007
Related Publication 20170328659A1 · Nov 16, 2017
Cited By (2)
US 50,303 US 1,082,500