Ar based autoloading shotgun with a detachable magazine

Abstract

Disclosed is an autoloading shotgun firearm which shares interchangeable fully compatible modular sub-assemblies, ergonomics, parts commonality, and exterior appearance with the AR rifle platform. Rapidly reversible tool less conversion from rifle to shotgun and vice versa is accomplished by substitution of the AR rifle upper receiver and ammunition detachable magazine with fully compatible shotgun upper receiver and ammunition detachable magazine. Said shotgun utilizes standard rimmed shotgun ammunition via features in the detachable magazine which securely maintain the position and facilitate the feeding of the cartridges during normal operation. No alteration of the AR rifle lower receiver is required. A short-recoil action is integrated into the shotgun upper receiver. The external appearance and functionality of the AR rifle are retained while eliminating the complexity and inherent fouling issues of typical gas systems used in the AR rifle. A short-recoil action also enables the shotgun to function reliably with shorter length barrels.

Description

RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 990,326 filed May 8, 2014 and entitled “AUTOLOADING SHOTGUN WITH A DETACHABLE MAGAZINE”, which is incorporated herein by this reference.TECHNICAL FIELD[0002]This disclosure relates to shotgun type firearms, to rifle type firearms configured for firing shotgun cartridge type ammunition, to magazines for loading shotgun cartridge type ammunition and to methods of manufacturing such shotgun type firearms and magazines for loading such shotgun cartridge type ammunition.BACKGROUND[0003]Historically, shotguns were the well known single and double barrel embodiments utilizing manually loaded and ejected ammunition. Progressively, a variety of fixed and detachable methods to hold and feed ammunition into the firing chamber have been used.[0004]AR10 and AR15 “AR rifles” date back to 1955 and 1958, respectively.[0005]AR rifles feature ergonomic controls, parts commonality, and opera...

AI Technical Summary

Benefits of technology

The invention is a shotgun upper receiver assembly with a short-recoil action. This design simplifies the manufacturing process and eliminates the complexity and fouling issues typically associated with gas systems used in the AR rifle. The short-recoil action also allows the shotgun to function reliably with a shorter length barrel. The barrel extension component features an extended integrated feed ramp that facilitates early and positive alignment of the protruding locking lugs of the advancing bolt with their corresponding slots in the barrel extension. Overall, this design provides a way to integrate a short-recoil type mechanism into the form factor of the AR rifle upper receiver assembly that utilizes an AR type bolt carrier assembly with a locking rotating bolt not adversely affected by shorter barrel lengths.

Problems solved by technology

The AR rifle upper receiver and detachable magazine are not inherently suitable for shotgun cartridges which are relatively bulky, blunt in shape, and have a rim at the base which projects beyond the diameter of the remainder of the shotgun cartridge.

Fixed magazines do not support this capability.

The gas operated mechanism is not suitable for a shotgun platform where a short barrel is desirable for certain tactical applications.

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