Apr 21, 2026

US12607426 - Semi-automatic shotgun and components thereof

A semiautomatic shotgun comprising a receiver, a barrel, a forward gas block assembly attached to the barrel, a slider assembly rearward of the gas block assembly extending into the receiver. Upon firing a shotshell the explosive gases in the barrel are diverted through two ports into the gas block assembly, specifically into a pair of lateral pressure relief valves positioned on both sides of the barrel. The pressure relief valves further having a gas pathway from the barrel provided by clusters of holes less than a specific size and on-center with the barrel axis. A piston is forced rearwardly and engages a slider of the slider assembly that is linked to a breech block in the receiver. The breech block loads unfired shells and ejects the fired shells accomplishing the semiautomatic recycling. The dual pressure relief valves actuate to moderate and limit the gas pressure that enters the piston chamber when using shotshells of different power levels thereby providing consistency in the recycling operation. The shotgun assembled with a plurality of retention pins having uniformly sized O-rings.

Assignee: Savage Arms, Inc.
Inventors: Aaron K. Alexander, John Linscott
Filing date: 2024-01-23

shotgunsemiautomaticfirearmammunition

The patent describes a semi-automatic shotgun featuring a unique gas block assembly with dual pressure relief valves that regulate gas pressure during operation, enhancing consistency across various shotshell power levels. This design includes a breech block mechanism that efficiently loads and ejects shells, ensuring reliable cycling of the firearm.

Claim 1

1 . A semiautomatic shotgun, comprising: a receiver defining a receiver interior; a breech block positioned in the receiver interior, the breech block having an in-battery position and an open position; a barrel attached to a forward portion of the receiver, the barrel having a barrel wall extending forwardly from the receiver, the barrel wall defining a barrel bore with a barrel axis; a piston and a piston cylinder defining a piston chamber, the piston chamber being fluidly connected to the barrel bore and the piston being operatively coupled to the breech block for selectively moving the breech block between the in-battery position and the open position; and a pair of pressure regulators fluidly connected to the piston chamber by way of respective clusters of holes through the barrel wall, each hole having a diameter of less than .070 inches. a receiver defining a receiver interior; a breech block positioned in the receiver interior, the breech block having an in-battery position and an open position; a barrel attached to a forward portion of the receiver, the barrel having a barrel wall extending forwardly from the receiver, the barrel wall defining a barrel bore with a barrel axis; a piston and a piston cylinder defining a piston chamber, the piston chamber being fluidly connected to the barrel bore and the piston being operatively coupled to the breech block for selectively moving the breech block between the in-battery position and the open position; and a pair of pressure regulators fluidly connected to the piston chamber by way of respective clusters of holes through the barrel wall, each hole having a diameter of less than .070 inches.

Google Patents

https://patents.google.com/patent/US12607426

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12607426