Oct 6, 2026

US12753998 - Subsonic firearm cartridge

Firearm cartridges are provided. The firearm cartridge includes a projectile and a cartridge case. The cartridge case includes head, body, shoulder, and neck sections. The cartridge case further includes a case wall. The case wall defines a chamber that extends from the head section to the neck section and has at least a first thickness about the body section and a second thickness about the shoulder section, the second thickness being less than the first thickness. The case wall about the shoulder section defines a hollow volume. The case wall about the neck section engages with the projectile, and the case wall about at least at least a portion of the body section is in contact with the projectile. The chamber is separated into a first chamber portion within the body section and a second chamber portion within the shoulder section by an engagement between the projectile and the wall.

Assignee: Q, LLC
Inventors: Ethan Michel Lessard
Filing date: 2024-05-09

firearmcartridgeammunitionsubsonic

The patent describes a subsonic firearm cartridge featuring a cartridge case with varying wall thicknesses that enhance performance by reducing the pressure required to deform the case. This design includes a hollow volume in the shoulder section and ensures that the projectile engages properly with the neck and body sections of the cartridge case.

Claim 1

1 . A firearm cartridge, comprising: a projectile; and a cartridge case, comprising: a head section; a body section, adjacent to the head section; a shoulder section, adjacent to the body section; and a neck section, adjacent to the shoulder section, wherein the cartridge case includes a case wall, the case wall defining a chamber that extends from the head section to the neck section and having at least a first thickness about the body section and a second thickness about the shoulder section, wherein the second thickness is less than the first thickness, wherein the case wall about the neck section engages with the projectile, and a projectile; and a cartridge case, comprising: a head section; a body section, adjacent to the head section; a shoulder section, adjacent to the body section; and a neck section, adjacent to the shoulder section, a head section; a body section, adjacent to the head section; a shoulder section, adjacent to the body section; and a neck section, adjacent to the shoulder section, wherein the cartridge case includes a case wall, the case wall defining a chamber that extends from the head section to the neck section and having at least a first thickness about the body section and a second thickness about the shoulder section, wherein the second thickness is less than the first thickness, wherein the case wall about the neck section engages with the projectile, and wherein at least a portion of the case wall at the body section is in contact with the projectile, and wherein the case wall about the shoulder section defines a hollow volume, and wherein the hollow volume is configured such that an applied pressure required to deform the cartridge case is less where the case wall has the second thickness than where the case wall has the first thickness.

Google Patents

https://patents.google.com/patent/US12753998

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12753998