May 19, 2026

US12631414 - Gun magazine including spring with uneven stack height upon compression

A gun magazine spring and magazine assembly having a novel design. The coils of the spring are configured to nest in certain regions and overlap in others. The result is that—as the spring nears its fully compressed state—the spring has an uneven stack height from left to right. The uneven stack height produces a predictable lateral displacement of the follower. The higher of the two stacked sides of the spring protrudes laterally outward through a lateral relief in the follower. This feature allows the spring and follower to overlap in the vertical direction to a greater extent than would be possible with conventional laterally-even spring nesting. The additional overlap produces additional internal space while also ensuring that the spring and follower assembly behave in a predictable manner.

Inventors: Brandon Vitulli
Filing date: 2024-09-13

firearmmagazinespringammunition

The patent describes a gun magazine spring designed with uneven stack heights upon compression, allowing for increased internal space and predictable lateral movement of the follower. This innovative configuration enhances the functionality of the magazine by enabling better overlap between the spring and follower compared to conventional designs.

Claim 1

1 . A magazine for feeding a plurality of cartridges into a firearm, comprising: (a) a tube having a lower end, an upper end, a forward wall, a left wall, a rearward wall, and a right wall; (b) a base closing said lower end of said tube; (c) a follower within said tube, said follower being free to slide up and down in said tube; (d) a magazine spring compressed between said base and said follower, including, (i) a plurality of coils, (ii) each coil in said plurality of coils including a forward region, a left region, a rearward region, and a right region, (iii) a first quantity of said left regions being positioned to nest with other left regions upon compression of said magazine spring, (iv) a second quantity of said right regions being positioned to nest with other right regions upon compression of said magazine spring, (v) wherein said second quantity is less than said first quantity, so that a right side compressed height of said magazine spring is greater than a left side compressed height of said magazine spring; (e) said follower having an upper portion and a lower portion, said upper portion being configured to bear against said cartridges loaded in said magazine and urge said cartridges upward; and (f) said follower including a downward-opening spring receiver cavity: (g) an upper portion of said magazine spring resting within said spring receiver cavity; and (h) said greater compressed height of said right side of said magazine spring with respect to said left side of said magazine spring producing a lateral movement of said follower with respect to said spring upon compression of said spring. (a) a tube having a lower end, an upper end, a forward wall, a left wall, a rearward wall, and a right wall; (b) a base closing said lower end of said tube; (c) a follower within said tube, said follower being free to slide up and down in said tube; (d) a magazine spring compressed between said base and said follower, including, (i) a plurality of coils, (ii) each coil in said plurality of coils including a forward region, a left region, a rearward region, and a right region, (iii) a first quantity of said left regions being positioned to nest with other left regions upon compression of said magazine spring, (iv) a second quantity of said right regions being positioned to nest with other right regions upon compression of said magazine spring, (v) wherein said second quantity is less than said first quantity, so that a right side compressed height of said magazine spring is greater than a left side compressed height of said magazine spring; (i) a plurality of coils, (ii) each coil in said plurality of coils including a forward region, a left region, a rearward region, and a right region, (iii) a first quantity of said left regions being positioned to nest with other left regions upon compression of said magazine spring, (iv) a second quantity of said right regions being positioned to nest with other right regions upon compression of said magazine spring, (v) wherein said second quantity is less than said first quantity, so that a right side compressed height of said magazine spring is greater than a left side compressed height of said magazine spring; (e) said follower having an upper portion and a lower portion, said upper portion being configured to bear against said cartridges loaded in said magazine and urge said cartridges upward; and (f) said follower including a downward-opening spring receiver cavity: (g) an upper portion of said magazine spring resting within said spring receiver cavity; and (h) said greater compressed height of said right side of said magazine spring with respect to said left side of said magazine spring producing a lateral movement of said follower with respect to said spring upon compression of said spring.

Google Patents

https://patents.google.com/patent/US12631414

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12631414