Magazine Capacity Limiter Assembly for Adjustable Firearm Magazine
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Solution Overview
Problem
Existing methods for limiting firearm magazine capacity are either unreliable, require substantial modifications that compromise 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, configured to be installed within the magazine spring coils, limiting the follower's travel and cartridge capacity, with adjustable notches and catch mechanisms to securely engage, allowing for easy conversion between different capacities without affecting reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a rivet is installed in the side of the magazine to limit downward travel of the follower, then magazine capacity is limited, but the magazine body requires substantial exterior modification and trial and error to find the correct position
Solution Approach 1:
A capacity limiting assembly is introduced as an intermediary component between the magazine spring and the magazine body. This assembly includes a body portion that interfaces with the spring and a follower portion that limits follower travel, thereby limiting capacity without requiring exterior modification of the magazine body.
Solution Approach 2:
The capacity limiting function is extracted from the magazine body and implemented as a separate, removable assembly. This allows the limiting function to be added without permanent modification to the magazine body, eliminating the need for trial and error positioning of rivets or other permanent modifications.
2Quantity of substance
If a large block is installed under the bottom of the magazine spring to limit capacity, then capacity is limited, but spring tension and wear increase
Solution Approach 1:
The capacity limiting assembly serves as an intermediary that distributes the mechanical load evenly across its contact surfaces with both the spring and the follower. This eliminates the need for large blocks that concentrate stress, thereby reducing spring tension spikes and wear while achieving capacity limitation.
3Quantity of substance
If magazine followers are modified to limit capacity, then capacity is limited, but magazine reliability and functionality are adversely affected
Solution Approach 1:
The capacity limiting function is segmented into a separate assembly that works in conjunction with the existing follower, rather than modifying the follower itself. The limiting assembly includes a body portion and a follower portion that together constrain the original follower's travel without altering its critical anti-tilt features or other reliability-dependent characteristics.
4Quantity of substance
If epoxy or roll pin the magazine body permanently closed to limit capacity, then capacity is limited and the modification is permanent, but the magazine cannot be reconfigured back to higher capacity for use in liberal jurisdictions
Solution Approach 1:
The capacity limiting assembly is designed with dynamic characteristics, allowing it to be easily removed and reinstalled. The assembly can be detached from the magazine spring and reattached to different capacities, enabling the magazine to adapt between restricted and unrestricted jurisdictions without permanent modification.
Solution Approach 2:
The limiting assembly is segmented into removable components that can be separated from the magazine body. This segmentation allows the assembly to be taken out when higher capacity is needed in liberal jurisdictions and reinstalled when capacity limitation is required in restricted jurisdictions, providing legal adaptability.
5Adaptability or versatility
If a capacity limiting assembly is designed to be removable and adjustable, then adaptability between jurisdictions is improved, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into a single integrated capacity limiting assembly. The assembly combines the spring interface, follower constraint, and capacity limitation features into one unit that can be installed and removed as a single component, reducing the complexity that would otherwise result from multiple separate modifications.
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 limiter base is coupled to both the limiter body and the magazine's floor plate.