Magazine Capacity Limiter Spring Extraction
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Solution Overview
Problem
Existing methods for limiting firearm magazine capacity are either unreliable, require substantial modifications that compromise magazine functionality, or do not allow for easy conversion between different capacity settings, failing to provide a cost-effective and efficient solution to comply with regulatory requirements.
Innovation Solution
A magazine capacity limiting assembly that includes a limiter body and base, installed within the magazine spring coils to restrict the follower's travel, allowing for adjustable cartridge capacity without affecting reliability, and can be easily configured to comply with varying legal requirements by severing extensions or using interchangeable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a rivet is installed in the side of the magazine to limit follower travel, then magazine capacity is limited, but exterior modification is required and substantial trial and error is needed to find correct rivet position
Solution Approach 1:
The invention extracts the capacity-limiting function from exterior modifications and relocates it to an internal component - the follower retention spring. By reducing the spring's length, the magazine capacity is limited without requiring exterior rivets or modifications, eliminating trial-and-error positioning and simplifying the manufacturing process.
Solution Approach 2:
The invention changes the physical parameter of the follower retention spring (its length) to achieve capacity limiting. By providing springs of different lengths, the system allows easy adjustment of magazine capacity without complex modifications, directly addressing the ease of manufacture concern while effectively limiting cartridge capacity.
2Quantity of substance
If a large block is installed under the bottom of the magazine spring to limit capacity, then cartridge capacity is reduced, but spring tension increases and wear increases
Solution Approach 1:
The invention removes the need for large blocking components by using a simpler approach - a shortened follower retention spring. This eliminates the block that caused increased spring tension and wear, while still achieving capacity limiting through the spring's reduced length, thereby maintaining spring durability and reliability.
3Quantity of substance
If magazine followers are modified to limit capacity, then cartridge capacity is reduced, but magazine reliability and functionality are adversely affected
Solution Approach 1:
The invention extracts the capacity-limiting function from the follower itself and places it in the follower retention spring. This preserves the follower's critical anti-tilt features and functionality while achieving capacity limiting through the spring's shortened length, avoiding any adverse effects on magazine reliability.
4Quantity of substance
If the magazine body is permanently closed by epoxy or roll pinning, then capacity limitation is permanent and legally compliant, but the magazine cannot be reconfigured for higher capacity in other jurisdictions
Solution Approach 1:
The invention makes the capacity limitation dynamic rather than permanent by using interchangeable follower retention springs of different lengths. Users can swap springs to change capacity according to jurisdictional requirements, providing adaptability and versatility while maintaining legal compliance, unlike permanent epoxy or roll pin modifications.
Solution Approach 2:
The invention creates a universal system where a single magazine body can accommodate multiple capacity configurations through interchangeable springs. This multi-functional approach allows the same magazine to comply with different legal requirements across various jurisdictions, enhancing adaptability without requiring permanent modifications.
5Quantity of substance
If different replacement springs are installed in different magazine bodies, then capacity can be adjusted, but a generic solution is not provided
Solution Approach 1:
The invention provides a generic, standardized solution by creating follower retention springs that fit multiple magazine models (AR-15, AK-47, Glock, etc.). A single spring design with model-specific length variations can be used across different magazine types, providing both capacity adjustment and system standardization, reducing complexity compared to custom solutions for each magazine model.
Data Source
AI summary
The present invention relates to systems and methods for reliably limiting the cartridge loading capacity of firearm magazines. In one embodiment, a magazine capacity limiting assembly includes a limiter body and a limiter base. The magazine capacity limiter body reliably operates with a cartridge follower of a firearm magazine. The limiter body is installed substantially within coils of the magazine's spring, thereby limiting the travel of the follower within the magazine body to limit the magazine's cartridge capacity. The lower portion of the limiter body can include a plurality of extensions is configured to be severed at a corresponding plurality of pre-determined locations corresponding to a plurality of cartridge capacities. The limiter may also include a cupped top configured to be securely coupled the cartridge follower of a corresponding type of firearm.