US12498189 - Double stack magazine for firearm

The patent describes a double stack magazine designed for firearms, featuring a tubular body that accommodates a vertically staggered arrangement of rimmed cartridges in a lower double stack section and a single stack section above it. The magazine includes a spring-loaded follower with angled feed surfaces that alternately engage cartridges based on their position, ensuring efficient dispensing for chambering.

Claim 1

1 . A double stack magazine for a firearm comprising: an elongated tubular magazine body defining a vertical centerline and an internal cavity configured to hold a stack of rimmed cartridges, the magazine body including an at least partially open top end, a bottom end, a front wall, a rear wall, and opposed lateral sidewalls extending between the front and rear walls; the magazine body including a lower double stack section configured to hold a vertically staggered double stack of the cartridges, an upper single stack section, and a transition section formed between the double stack section and the single stack section; a spring disposed in the cavity; a follower moveably disposed in the cavity and biased in an upwards direction towards the top end of the magazine body by the spring; the follower comprising a rear cartridge feed surface and adjoining front cartridge feed surface each configured to selectively engage and support an ammunition cartridge, the rear feed surface being disposed at an oblique angle to the front feed surface ; the front and rear cartridge feed surfaces each configured to engage and support a lowermost cartridge of the stack at alternate different times depending on a number of cartridges present in the stack. an elongated tubular magazine body defining a vertical centerline and an internal cavity configured to hold a stack of rimmed cartridges, the magazine body including an at least partially open top end, a bottom end, a front wall, a rear wall, and opposed lateral sidewalls extending between the front and rear walls; the magazine body including a lower double stack section configured to hold a vertically staggered double stack of the cartridges, an upper single stack section, and a transition section formed between the double stack section and the single stack section; a spring disposed in the cavity; a follower moveably disposed in the cavity and biased in an upwards direction towards the top end of the magazine body by the spring; the follower comprising a rear cartridge feed surface and adjoining front cartridge feed surface each configured to selectively engage and support an ammunition cartridge, the rear feed surface being disposed at an oblique angle to the front feed surface ; the front and rear cartridge feed surfaces each configured to engage and support a lowermost cartridge of the stack at alternate different times depending on a number of cartridges present in the stack.

Google Patents

https://patents.google.com/patent/US12498189

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12498189