Nov 3, 2026

US12782072 - Drum magazine assembly and methods

A magazine assembly for a firearm and a related method are disclosed. The assembly has a magazine housing defining a track, and a follower assembly. The magazine housing is configured to constrain a cartridge as the cartridge is moved within the magazine assembly such that majority of a proximal surface area of the cartridge does not contact the magazine housing, and a distal tip of the cartridge does not contact the magazine housing.

Assignee: Magpul Industries Corp.
Inventors: Timothy Eric Roberts, Michael Mayberry, Brian L Nakayama, Richard M Fitzpatrick, Eric Nakayama, William Bradley Bennett
Filing date: 2024-10-07

firearmmagazineammunition

The patent describes a drum magazine assembly designed to minimize contact between cartridges and the magazine housing, ensuring smoother operation. It also details a method for manufacturing a rear cover assembly that incorporates a window with flanges and protrusions through an over-molding process.

Claim 1

1 . A method of manufacturing a rear cover assembly for a firearm magazine comprising: a. providing a window, having at least one flange and at least one protrusion; b. molding a rear cover body onto the window in a configuration such that the protrusion extends towards an interior region of the rear cover body in an over-molding process. a. providing a window, having at least one flange and at least one protrusion; b. molding a rear cover body onto the window in a configuration such that the protrusion extends towards an interior region of the rear cover body in an over-molding process.

Google Patents

https://patents.google.com/patent/US12782072

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12782072