Modular Stock Adapter for Rail-Mounted Accessory Compatibility
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Solution Overview
Problem
AR-pattern firearms with relocated action springs and non-functional buffer tubes cannot accommodate rail-mounted accessories designed for standard buffer tube mounting interfaces, limiting the compatibility of newer accessories with standard AR-pattern receivers and other firearms.
Innovation Solution
A modular adapter featuring a base plug with a threaded exterior to engage the receiver's socket and a modular adaptation element with a transverse slot and boss to prevent rotation, allowing for the attachment of accessories via a standardized rail system, such as Picatinny or MIL-STD-1913, on firearms without traditional buffer tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standardized threaded socket is used for buffer tube mounting, then traditional stocks and braces can be attached, but rail-mounted accessories cannot be mounted on firearms with relocated action springs
Solution Approach 1:
The adapter serves as an intermediary component that bridges the threaded socket interface and the rail-mounted accessory interface. It threads into the existing socket and provides a rail interface, allowing accessories designed for rails to be mounted on firearms with traditional threaded sockets, thereby resolving the incompatibility without modifying the original mounting interface
Solution Approach 2:
The adapter provides multi-functionality by supporting both traditional threaded socket mounting and modern rail-mounted accessory attachment. This universal approach allows the same adapter to work with various accessory types and mounting preferences, enhancing overall system versatility
2Ease of operation
If rail-mounted accessories are designed for modular attachment, then ease of installation and adjustment is improved, but compatibility with standard AR-pattern receivers is lost
Solution Approach 1:
The adapter acts as a mediator that translates between the rail mounting system and the threaded socket interface. It provides the rail interface features (engagement slot and boss) that enable easy modular attachment while simultaneously providing the threaded exterior that interfaces with standard AR-pattern receivers, thus maintaining compatibility
3Adaptability or versatility
If a fixed buffer tube is used, then structural simplicity is maintained, but folding mechanisms and alternate configurations are not possible
Solution Approach 1:
The adapter divides the buffer tube system into separate functional segments: the fixed buffer tube portion that maintains structural simplicity and the detachable adapter portion that provides configuration options. This segmentation allows the buffer tube to remain simple while the adapter enables folding mechanisms and alternate configurations through its modular design
Data Source
AI summary
Provided is a modular adapter for a firearm receiver that has a standardized threaded socket for mounting a tubular extension or stock support. The adapter includes a base plug configured to threadably engage the threaded socket of a receiver and a modular adaption element attached to the base plug and against a rear surface of the receiver. The adaption element presents an attachment means for attaching an accessory, such as a stock, to the adaption element.