Modular Bolt-Action Rifle for Tool-Free Caliber Changes
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Solution Overview
Problem
Existing bolt-action rifles lack modularity and ease of caliber change, requiring specialized tools and custom magazines, which is inconvenient for military and law enforcement personnel in combat situations.
Innovation Solution
A modular bolt-action rifle system with an AR-style fire control, adjustable magazine well, and interchangeable bolt and barrel allows for quick caliber changes without specialized tools, using a floating magazine well and detente mechanism for secure attachment of the barrel and handguard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional bolt-action rifles are used, then structural simplicity is maintained, but the ability to quickly change calibers and adapt to different missions is lost
Solution Approach 1:
The rifle is divided into separate modular components including an upper receiver assembly with barrel, a lower receiver assembly, and interchangeable bolt carrier groups calibrated for different calibers. This segmentation allows users to quickly swap bolt carrier groups to change calibers without replacing the entire rifle, thereby improving adaptability while managing complexity through standardized interfaces.
Solution Approach 2:
The upper receiver assembly is designed with universal mounting features that accommodate different barrel lengths and calibers through standardized attachment mechanisms. The modular design enables a single upper receiver to support multiple calibers via interchangeable components, providing multi-functionality that resolves the contradiction between adaptability and complexity.
2Productivity
If conventional bolt-action rifles are used, then manufacturing simplicity is maintained, but assembly and disassembly time increases during combat operations
Solution Approach 1:
The bolt carrier groups are pre-assembled and pre-calibrated for specific calibers before deployment. This preliminary preparation eliminates the need for complex field assembly operations during combat, allowing users to simply attach the pre-configured bolt carrier group to change calibers rapidly, thereby improving productivity while minimizing time loss.
Solution Approach 2:
The modular system incorporates dynamic attachment mechanisms that allow quick connection and disconnection of bolt carrier groups to the upper receiver assembly. The designed interfaces enable rapid switching between different calibrated components during operations, significantly reducing the time required for caliber changes compared to conventional fixed designs.
3Volume of moving object
If conventional bolt-action rifles are used, then structural simplicity is maintained, but compact storage capability is insufficient for military and law enforcement applications
Solution Approach 1:
The modular design allows the bolt carrier group and barrel assembly to be nested within or attached to the upper receiver assembly in a compact configuration. When not in use, components can be stored in designated recesses or attached in a space-efficient manner, reducing the overall storage volume required while managing complexity through organized modular architecture.
Data Source
AI summary
The present disclosure presents a modular bolt action rifle system with roller bearings having an upper receiver assembly housing a barrel, a lower receiver assembly comprising an AR-style fire control system and a magazine well, a bolt carrier group assembly including a bolt carrier, top roller bearings and side roller bearings, and a handguard assembly, wherein the lower receiver assembly and its AR-style fire control and magazine well are releasably attached to the upper receiver, and prior to attachment of the barrel assembly the bolt carrier group assembly, consisting of the bolt carrier, bolt head, bolt charging handle, top roller bearings, and side roller bearings is inserted unto the upper receiver. An extension of the barrel assembly is releasably attached to the upper receiver. The barrel assembly is releasably secured by releasable attachment of the handguard assembly to a barrel extension receiver of the upper receiver assembly.