Modular Rifle Stock Assembly with Interchangeable Receiver Cages
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Solution Overview
Problem
Conventional rifle stock assemblies are not adaptable to different barreled receivers, requiring separate stocks for various calibers and manufacturers, which is costly and inconvenient for shooters seeking customized fits.
Innovation Solution
A modular rifle stock assembly featuring a cage and magazine collets that can be configured to accommodate different barreled receivers, allowing for interchangeable use with various receiver configurations and magazine sizes without sacrificing customized adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rifle stock is custom-made to fit a specific barreled receiver, then the fit precision and stability are improved, but the adaptability to different receivers deteriorates
Solution Approach 1:
The stock assembly is divided into separate modular components: a base stock and interchangeable adapter blocks. Each adapter block is specifically configured for a particular receiver type (e.g., AR-15, AK-47, Remington 700), while the base stock remains constant. This segmentation allows the shooter to maintain a single customized stock while swapping adapter blocks to achieve precise fits for different receiver configurations.
Solution Approach 2:
The base stock is designed as a universal platform that can accommodate multiple receiver types through the use of interchangeable adapter blocks. The adapter blocks serve as multi-functional interfaces, each designed to mate with specific receiver dimensions and configurations while providing a standardized mounting interface to the base stock. This enables one stock to universally support various calibers and manufacturers.
2Manufacturing precision
If different stocks are made for each barreled receiver configuration, then the fit precision is improved, but the device complexity and cost increase
Solution Approach 1:
Instead of creating entirely different stocks for each receiver type, the system segments the adaptation function into separate adapter blocks. The base stock design remains simple and unchanged, while the complexity of accommodating different receivers is isolated to the interchangeable adapter blocks. This reduces the overall device complexity compared to maintaining multiple complete stock designs.
Solution Approach 2:
The adapter blocks are designed as standardized copies with consistent mounting interfaces and adjustment mechanisms. Once an adapter block design is developed for one receiver type, the same basic structure can be copied and adapted for other receiver types by modifying only the receiver-specific interface portion, rather than redesigning the entire stock assembly.
3Manufacturing precision
If different stocks are made for each barreled receiver configuration, then the fit precision is improved, but the cost increases
Solution Approach 1:
The system separates the expensive customized elements (base stock with adjustments) from the standardized adapter blocks. The base stock can be manufactured once with precise customizations, while the adapter blocks are simpler components that can be produced more economically in larger quantities. This segmentation reduces the total cost compared to manufacturing multiple complete custom stocks.
Solution Approach 2:
The base stock serves as a universal platform that eliminates the need to manufacture multiple complete stock assemblies. By designing the base stock to work with various adapter blocks, the manufacturer produces one high-quality customized stock instead of several, significantly reducing manufacturing costs while maintaining fit precision through the adapter interface.
Data Source
AI summary
A rifle stock assembly adapted to receive and support a bolt action rifle barreled receiver is disclosed. The assembly includes a rifle stock/chassis having an elongated recess and a cage removably fastened to the chassis in the recess to receive a bolt action rifle receiver therein. The assembly may also have a pair of magazine collets fastened to the bottom of the forward portion of the chassis defining a magazine well beneath the cage. Cages having different internal surface shapes may be utilized to accommodate different barreled receivers in the same rifle stock/chassis. Different magazine collets may also be utilized to accommodate different caliber magazines used with the different barreled receivers.