Firearm Magazine Extension Internal Locking Mechanism
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Solution Overview
Problem
Existing magazine extensions for firearms have limited capacity, are prone to damage or loss due to complex assembly mechanisms and externally accessible parts, and often require tools for installation and maintenance.
Innovation Solution
A universal, high-capacity magazine extension with an internal locking mechanism and minimal separable components, featuring a retaining member and base plate design that secures the extension without external interlocking parts, allowing tool-free assembly and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If magazine extensions use complex assembly mechanisms with multiple rods or pins to increase capacity, then ammunition capacity is improved, but device complexity increases and reliability decreases due to more parts that can be lost or damaged
Solution Approach 1:
The magazine extension is divided into three main segments: the extension body (which increases capacity), the retaining member (for attachment), and the base plate (for closure). This segmentation allows each component to be optimized independently while maintaining overall simplicity, avoiding the need for multiple rods or pins throughout the structure.
Solution Approach 2:
The design extracts and eliminates unnecessary intermediate components (rods, pins, complex interlocking mechanisms) that were present in prior art. The retaining member and base plate directly secure the extension body without requiring additional fastening elements, reducing the total part count while maintaining structural integrity.
2Ease of operation
If magazine extensions use externally accessible interlocking components to secure the extension body, then ease of assembly is improved, but reliability worsens as external parts become susceptible to bending, breaking, or dislodging during use
Solution Approach 1:
The retaining member is nested within the extension body structure, with its arms positioned inside the hollow body rather than externally. The base plate nests over the retaining member arms, creating a layered, protected configuration. This nesting protects the interlocking components from external damage while maintaining assembly functionality.
Solution Approach 2:
The retaining member features localized engagement points with specific geometries designed for easy insertion and secure retention. The arms have optimized shapes that engage with corresponding features in the extension body, providing reliable locking without requiring external accessibility or complex mechanisms.
3Reliability
If magazine extensions require tools for assembly and disassembly to ensure secure attachment, then reliability is improved, but ease of operation worsens due to the need for specialized tools
Solution Approach 1:
The magazine extension is designed as a self-servicing system where the retaining member and base plate can be assembled and disassembled by hand without tools. The user can simply press the base plate to release the retaining member arms and slide the extension body on or off, making the system as convenient as native floorplates while maintaining secure attachment.
Solution Approach 2:
The retaining member arms are designed with flexible yet sturdy characteristics, allowing them to be compressed manually for assembly and then spring back to secure the extension body. This dynamic behavior enables tool-free operation while ensuring reliable attachment during firearm use.
Data Source
AI summary
A magazine extension comprises an extension body having an open upper end configured to be slidably coupled with an open bottom end of a magazine tube for an ammunition magazine, a retaining member, and a base plate. The retaining member is removably receivable in a passage defined through a rear wall of the extension body to releasably secure the body to the magazine tube. A portion of the retaining member protrudes out of an upper end of the passage and overlaps a rear wall of the magazine tube to limit sliding movement of the tube relative to the extension body when the tube is coupled with the body and the retaining member is received in the passage. The base plate is configured to be slidably coupled with an open lower end of the extension body and obstruct a lower end of the passage to releasably secure the retaining member in the passage.