Adjustable Rifle Stock with Hook Rail Attachment
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Solution Overview
Problem
Existing firearm stocks that are collapsible and adjustable often require professional installation, can loosen over time due to recoil forces, or fail to fit properly on the host firearm, affecting accuracy and appearance.
Innovation Solution
An adjustable firearm stock with a body featuring a Picatinny rail attachment system, including an elongated channel with hook surfaces and a securement facility, allowing for secure attachment and adjustment between extended and collapsed positions without professional installation, using a locking block and set screw mechanism to resist separation and ensure stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a collapsible stock design is used to provide extended and collapsed positions, then the adaptability and ease of storage are improved, but the reliability and stability deteriorate due to loosening from recoil forces
Solution Approach 1:
The Picatinny rail attachment system with hook surfaces and securement facility is pre-configured to resist separation forces before they occur during recoil, preventing loosening rather than correcting it after
Solution Approach 2:
The hook surfaces are curved to conform to the Picatinny rail geometry, creating a positive mechanical engagement that resists separation forces from recoil while maintaining attachment stability
2Manufacturing precision
If professional installation is required for precise fit, then the manufacturing precision is improved, but the ease of operation deteriorates due to complex installation procedures
Solution Approach 1:
The Picatinny rail attachment system uses a standardized interface that can be installed by the end user without specialized tools or expertise, making the complex precision fit achievable through universal compatibility
Solution Approach 2:
The securement facility acts as an intermediary mechanism that simplifies the installation process while maintaining precise fit, allowing user-friendly attachment without requiring professional installation skills
3Volume of moving object
If the stock is made collapsible for compact storage, then the volume is reduced, but the strength and rigidity deteriorate
Solution Approach 1:
The stock is divided into segmented sections that can collapse together for compact storage but maintain structural integrity when extended, with the Picatinny rail attachment providing a strong connection point
Solution Approach 2:
The collapsible stock sections nest within each other when collapsed for storage, reducing overall volume while maintaining the ability to achieve full structural strength when extended to shooting position
Data Source
AI summary
An adjustable firearm stock has a body defining an elongated channel adapted to receive a rail, the channel having an internal width adapted to receive the width of the head portion of the rail, and opposed elongated hook surfaces defining a hook width adapted to receive the neck of the rail, the hook surfaces bear on the rail to resist separation of the body from the rail, the channel having an elongated floor surface parallel to and opposing the planar mounting surface of the rail, a foot element connected to the body and having a contact surface facing the planar mounting surface of the rail, and a securement facility operably connected to the foot element and to the body, and operable to move the foot with respect to the body to compress the rail between the contact surface of the foot and the hook surfaces.