AR Receiver Compatible with Pistol Magazines and Cartridges
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Solution Overview
Problem
AR-15 style firearms are not compatible with pistol magazines and cartridges, limiting the use of cheaper and more widely available pistol rounds.
Innovation Solution
Designing an AR style receiver that includes ambidextrous charging knobs, a spring-loaded detent system, and a convertible stock, allowing for the use of pistol magazines and cartridges, with features such as a non-reciprocating forward charging handle and a magazine insertion stop to accommodate pistol rounds like 9mm and 45 caliber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an AR-15 style firearm is designed with traditional rifle components, then it maintains reliability and structural integrity, but it cannot accommodate pistol magazines and cartridges
Solution Approach 1:
The receiver is designed with a universal magazine well that can accommodate both pistol magazines and rifle magazines through a standardized insertion path. The trigger group and firing mechanism are configured to work with both pistol and rifle cartridges, allowing a single receiver design to serve multiple functions and calibers without requiring separate firearm platforms.
2Quantity of substance
If pistol cartridges are used in an AR-15 style firearm, then ammunition cost decreases and availability increases, but the charging handle system must be modified to non-reciprocating operation
Solution Approach 1:
The charging handle system is segmented into two independent functions: a non-reciprocating charging handle for manual bolt cycling when using pistol cartridges, and a reciprocating mechanism for automatic operation with rifle cartridges. This segmentation allows each mode to operate optimally without compromising the other, giving the user flexibility based on ammunition type.
3Adaptability or versatility
If the firearm is modified to accept pistol magazines, then versatility improves, but the stock must be made convertible between rifle and pistol configurations
Solution Approach 1:
The stock incorporates a convertible mechanism that allows dynamic reconfiguration between rifle and pistol configurations. The stock can be quickly converted by collapsing the buttstock and repositioning the forend, transforming the firearm from a rifle configuration to a pistol configuration and vice versa, adapting to different operational requirements and user preferences.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the firing of pistol cartridges in an AR-15 style firearm, enhancing compatibility and usability by allowing the use of cheaper and more widely available ammunition while maintaining the functionality of the firearm.
Implementation Method 1
a spring-loaded detent system, and a convertible stock
Data Source
AI summary
A firearm compatible with pistol magazines and cartridges is disclosed. The firearm may include an upper receiver. The firearm also may include a bolt carrier having at least one fixed bolt carrier key extending therefrom. In addition, the firearm may include a recoil spring guide rod. The at least one bolt carrier key may be slidably attached to the recoil spring guide rod. A recoil spring may be disposed on the recoil spring guide rod between the at least one bolt carrier key and a recoil bumper.