Firearm Magazine Cutoff for Safe Bolt Locking
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Solution Overview
Problem
Firearms with tube-type magazines require cumbersome procedures to unload and reload, which can lead to unsafe handling practices due to the complexity of manually ejecting and rechambering rounds, especially when moving or crossing obstacles.
Innovation Solution
A magazine cutoff device that can be positioned in multiple user-selectable settings to lock the bolt open, preventing further rounds from being chambered while retaining ammunition in the magazine, simplifying the process of ensuring an empty chamber for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a tube-type magazine is used, then ammunition can be stored in a compact manner, but the process of unloading and reloading becomes cumbersome and complex
Solution Approach 1:
The patent extracts the carrier from the normal loading cycle by introducing a magazine cutoff device that isolates the carrier mechanism. This allows the magazine to be emptied of functional loading capability while retaining physical ammunition, separating the storage function from the loading function.
Solution Approach 2:
The magazine cutoff device is pre-configured in multiple positions that can be set before use. The cutoff position is pre-established to automatically prevent carrier operation, eliminating the need for users to manually manage each round's ejection and re-chambering during movement.
2Reliability
If manual ejection and re-chambering of each round is required, then safety can be maintained by ensuring empty chamber, but the process becomes time-consuming and encourages unsafe handling practices
Solution Approach 1:
The magazine cutoff device acts as an intermediary mechanism between the user and the carrier system. By engaging the cutoff device, the user creates a mechanical barrier that prevents the carrier from transferring rounds, thereby ensuring the chamber remains empty without requiring manual intervention for each round.
Solution Approach 2:
The magazine cutoff device serves multiple functions simultaneously: it prevents carrier operation, ensures chamber emptiness, and allows retention of ammunition in the magazine. This multi-functionality eliminates the need for separate manual ejection and re-chambering operations for each round.
3Reliability
If the bolt is locked open to ensure empty chamber, then safety is improved, but the ability to quickly reload may be compromised
Solution Approach 1:
The magazine cutoff device is designed with dynamic positioning capability, allowing it to be shifted between cutoff and normal operating positions. This dynamic adjustment enables the system to transition from a safety-locked state to an operational state, balancing safety requirements with reloading speed needs.
Data Source
AI summary
A magazine cutoff device for a firearm with a tube-type magazine, such as, e.g., semi-automatic shotgun. The cutoff device may be moveably mounted to accommodate at least two positions, on and off. The user may activate the cutoff, pull the bolt to the rear, eject a chambered shell, and lock the bolt to the rear while retaining any shells in the magazine.