Stock Cheek Riser Charging Handle Access
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Solution Overview
Problem
Conventional rifle stocks, particularly those for M4 rifles, lack adjustable height and are not compatible with collapsed positions, causing issues with charging handle operation and interference with user equipment, and existing cheek risers are often incompatible with certain rifles and prone to failure.
Innovation Solution
A unitary, collapsible stock cheek riser with chamfered edges and angled surfaces that allows full charging handle operation even in collapsed positions, designed to fit various rifles and minimize interference with user gear, made from carbon fiber-infused nylon for rigidity and comfort adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional rifle stock is used, then the stock structure is simple and compatible with most rifles, but the stock cannot be adjusted in height and interferes with charging handle operation in collapsed position
Solution Approach 1:
The stock is divided into separate components: a base stock and an adjustable cheek riser assembly that can be independently positioned. The cheek riser assembly includes a riser body and a cheek rest that can be adjusted relative to each other, allowing height adjustment without complicating the overall stock structure.
Solution Approach 2:
The cheek riser assembly is designed with movable components that allow dynamic adjustment of height and angle. The spring-loaded mechanism enables the cheek rest to move between extended and retracted positions, providing adaptability while maintaining a relatively simple fixed structure when locked in place.
2Adaptability or versatility
If an adjustable cheek riser is added to provide height adjustment, then user comfort is improved, but the device becomes more complex and prone to failure
Solution Approach 1:
The cheek riser assembly integrates multiple functions into a single unit: height adjustment, angle adjustment, and cheek rest functionality are combined in one assembly that attaches to the stock. This reduces the number of separate adjustable components, thereby reducing potential failure points while maintaining adaptability.
Solution Approach 2:
The system provides adjustment through discrete parameter changes rather than continuous adjustment mechanisms. The cheek rest can be positioned at specific angles and heights using detented mechanisms, which are more reliable than continuous adjustment systems while still providing sufficient adaptability for different users.
3Ease of operation
If the stock is extended to allow charging handle operation, then charging handle access is improved, but the stock length increases and may interfere with user equipment
Solution Approach 1:
Instead of extending the stock length to improve charging handle access, the invention provides adjustment in the vertical dimension through height-adjustable cheek risers. This allows the charging handle to remain accessible in the collapsed position while providing the necessary cheek weld height through vertical adjustment rather than horizontal extension.
Data Source
AI summary
A stock cheek riser that includes two side walls connected by a hood, which form a channel for receiving a stock. The stock cheek riser is sized and its front face angled to provide sufficient room for manipulating a charging handle of the firearm to which the stock is attached, when the stock is in a collapsed position.