IP Library Granted Patent US 12,523,436
Granted Patent B2
US 12,523,436 · App. 18/985,794 · Granted Jan 13, 2026

Magazine extension

Inventor: Benjamin Ni Ye (North Richland Hills, TX)
Assignee: Shadow Systems LLC
F41A9/71
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Quick Facts
Patent No.
US 12,523,436
App. No.
18/985,794
Granted
Jan 13, 2026
Kind
B2
Abstract

A magazine extension is provided. The magazine extension includes a baseplate structured to receive a lower open end of a magazine, the baseplate having a laterally extending through-bore; a side bracket structured to couple to the baseplate for securing the magazine, the side bracket having a laterally extending through-bore; and a locking pin insertable within both the through-bore of the baseplate and the through-bore of the side bracket to lock the side bracket to the baseplate.

Claims (25)

1 . A magazine extension, comprising:

a baseplate structured to receive a lower open end of a magazine, the baseplate having two securing slots sized to receive respective rails of the magazine, each of the securing slots having an open end;

a side bracket releasably structured to couple to the baseplate for securing the magazine, wherein the baseplate and the side bracket are each formed into separate monolithic pieces; and

an insertable locking pin which bends to lock the side bracket to the baseplate.

2 . The magazine extension of claim 1 , wherein the baseplate includes a floor having an upper surface positioned to engage a magazine spring of the magazine.

3 . The magazine extension of claim 1 , wherein the baseplate includes a post receptacle and the side bracket includes a post structured to be received within the post receptacle.

4 . The magazine extension of claim 1 , wherein the insertable locking pin includes a first portion having a first diameter, a second portion having a second diameter smaller than the first diameter, and a stopping surface at an interface between the first portion and the second portion.

5 . The magazine extension of claim 1 , wherein the insertable locking pin is limited in lateral movement on a side by engagement between a first pin face and a first annular pin stop of the side bracket.

6 . The magazine extension of claim 5 , wherein the insertable locking pin is limited in lateral

movement on another side by engagement between a stopping surface of the insertable locking pin and a second annular pin stop on the baseplate.

7 . The magazine extension of claim 1 , wherein a lower surface of a handgrip prevents the side bracket from sliding upwardly.

8 . The magazine extension of claim 1 , wherein the side bracket includes a main body with an engagement end for engaging a proximal side of the magazine.

9 . The magazine extension of claim 1 , wherein the side bracket includes a stopping end to close an open end of a securing slot.

10 . A magazine extension, comprising:

a baseplate structured to receive a lower open end of a magazine, the baseplate having a proximal end, a distal end and two securing slots sized to receive respective rails of the magazine, each of the securing slots having an open end;

a side bracket releasably structured to couple to the baseplate for securing the magazine, the side bracket having an engagement end for engaging a proximal side of the magazine, and two stopping ends to respectively close the open ends of the securing slots, wherein the baseplate and the side bracket are each formed into separate monolithic pieces; and

an insertable locking pin which bends to lock the side bracket to the baseplate.

11 . The magazine extension of claim 10 , wherein the baseplate includes a floor having an upper surface positioned to engage a magazine spring of the magazine.

12 . The magazine extension of claim 10 , wherein the baseplate includes a post receptacle and the side bracket includes a post structured to be received within the post receptacle.

13 . The magazine extension of claim 10 , wherein the side bracket includes a stopping end to close an open end of a securing slot.

14 . The magazine extension of claim 10 , wherein a through-bore of the side bracket is mis-aligned with a through-bore of the baseplate when a post is closely received within a post receptacle of the baseplate.

15 . The magazine extension of claim 10 , wherein the insertable locking pin includes a first portion having a first diameter, a second portion having a second diameter smaller than the first diameter, and a stopping surface at an interface between the first portion and the second portion.

16 . The magazine extension of claim 10 , wherein the insertable locking pin is limited in lateral movement on a side by engagement between a first pin face and a first annular pin stop of the side bracket.

17 . The magazine extension of claim 16 , wherein the insertable locking pin is limited in lateral movement on another side by engagement between a stopping surface of the insertable locking pin and a second annular pin stop of the baseplate.

18 . The magazine extension of claim 10 , wherein a lower surface of a handgrip prevents the side bracket from sliding upwardly.

Assignments (2)
SECURITY INTEREST Recorded Jan 12, 2026
From: SHADOW SYSTEMS LLC
To: PATHWARD, NATIONAL ASSOCIATION
Reel/Frame 073438/0357 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2024
From: YE, BENJAMIN NI
To: SHADOW SYSTEMS LLC
Reel/Frame 069638/0067 →
Continuity (4)
Continuation 17943501 · Sep 13, 2022
Continuation In Part 17693839 · Mar 14, 2022
Provisional Application 63299731 · Jan 14, 2022
Related Publication 20250116471A1 · Apr 10, 2025
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Ye, Benjamin Ni: International Search Report and Written Opinion for PCT/US23/032533, filed Sep. 12, 2023, mailed Dec. 8, 2023, 9 pages. [cited by applicant]