Firearm Upper Receiver Assembly for Folded Stock Safety
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Solution Overview
Problem
Traditional AR15 firearms require the buffer tube to protrude for safe firing, limiting the ability to fold the stock for compact carrying without compromising safety.
Innovation Solution
The upper receiver assembly is designed to allow the firearm to fire safely while the buffer tube and stock are folded, using a folding stock adaptor and a solid or hollow receiver extension without a recoil spring or buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the buffer tube protrudes from the lower receiver, then the firearm can safely fire a cartridge, but the firearm cannot be compactly folded for carrying
Solution Approach 1:
The buffer tube assembly is segmented into multiple components: a buffer tube, a receiver extension, and a folding stock adaptor. This segmentation allows the buffer tube to be positioned within the receiver extension while the stock folds independently, resolving the contradiction between maintaining buffer tube protrusion for safety and enabling compact folding for portability.
Solution Approach 2:
A folding stock adaptor serves as an intermediary component between the buffer tube assembly and the folding stock. This adaptor enables the stock to fold while maintaining the buffer tube's proper positioning and protrusion, allowing both safety and compactness requirements to be satisfied simultaneously.
2Length of moving object
If the stock is folded to one side for compact carrying, then the firearm becomes more portable, but the firearm cannot safely fire a cartridge
Solution Approach 1:
The buffer tube assembly is segmented into multiple components: a buffer tube, a receiver extension, and a folding stock adaptor. This segmentation allows the buffer tube to be positioned within the receiver extension while the stock folds independently, resolving the contradiction between maintaining buffer tube protrusion for safety and enabling compact folding for portability.
Solution Approach 2:
The stock is designed to be dynamically foldable while the buffer tube assembly remains stationary and properly positioned. The folding stock adaptor enables this dynamic configuration, allowing the stock to move between folded and extended positions without affecting the buffer tube's positioning, thus maintaining safety during firing while enabling compact carrying.
3Length of moving object
If a folding stock adaptor is used to allow compact folding, then the firearm becomes more portable, but the existing buffer and recoil spring system cannot function properly
Solution Approach 1:
The buffer and recoil spring are extracted from the traditional buffer tube configuration and repositioned within the receiver extension. This extraction allows the folding stock adaptor to be installed without compromising the functionality of the buffer and recoil spring system, enabling both compact folding and proper operation of existing components.
Solution Approach 2:
The buffer and recoil spring are repositioned from the traditional horizontal configuration within the buffer tube to a vertical or alternative arrangement within the receiver extension. This dimensional change allows the folding stock adaptor to be integrated while maintaining the proper function of the buffer and recoil spring system.
Data Source
AI summary
An upper receiver assembly of a firearm is disclosed. The upper receiver assembly contains a barrel, an extension block removably coupled with the barrel, an upper receiver removably coupled with the extension block, a handguard mounting block removably coupled with the barrel, and a handguard removably coupled with the handguard mounting block.