Modular Buffer Tube Cover Assembly with Interchangeable Inserts
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Solution Overview
Problem
Existing buffer tube cover assemblies for firearms lack modularity and compatibility with various configurations, such as shoulder stocks and arm braces, which can lead to legal and ergonomic issues due to changing regulations and firearm classifications.
Innovation Solution
A modular buffer tube cover assembly comprising a cover base assembly with a lever, spring, and pins, along with interchangeable inserts for shoulder stocks, arm braces, and featureless configurations, allowing users to adapt the assembly to different firearm setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional non-modular buffer tube cover assembly is used, then the structure is simple and easy to manufacture, but the adaptability to different configurations (shoulder stock, arm brace, featureless) is poor
Solution Approach 1:
The buffer tube cover assembly is divided into separate modular components: a cover base assembly and interchangeable inserts. The cover base assembly includes a cover tube, lever, buffer locating portion, spring, and pins, while the inserts contain forward protruding members that interface with the cover base. This segmentation allows each component to be manufactured independently and assembled in different configurations, enabling adaptability to shoulder stock, arm brace, or featureless setups without redesigning the entire assembly.
Solution Approach 2:
The cover base assembly is designed as a universal interface that can accommodate multiple types of inserts with different configurations. The standardized interface between the cover base and inserts allows a single cover base assembly to support various functions including shoulder stock attachment, arm brace mounting, or featureless configurations, making the overall system multi-functional and adaptable to different user needs and legal requirements.
2Adaptability or versatility
If a modular interchangeable insert system is implemented, then the adaptability and compliance flexibility are improved, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
By segmenting the assembly into a cover base and separate inserts, each component can be manufactured using standard processes and then assembled through simple mechanical interfaces. The modular design allows parallel production of multiple insert types, reducing overall manufacturing complexity compared to producing complete custom assemblies for each configuration.
Solution Approach 2:
The inserts are designed to nest within the cover base assembly, with forward protruding members fitting into corresponding recesses in the cover tube. This nesting mechanism simplifies assembly by allowing the insert to be inserted and secured within the existing cover base structure without requiring separate mounting brackets or complex fastening systems.
3Ease of operation
If interchangeable inserts with forward protruding members are used, then the ease of swapping configurations is improved, but the precision of alignment and fit may be compromised
Solution Approach 1:
The forward protruding members on the inserts and corresponding recesses in the cover tube are designed with pre-established geometric relationships that ensure proper alignment during assembly. The lever mechanism is pre-configured with pins that engage with corresponding features on the insert and cover tube, automatically guiding components into correct positions and maintaining alignment precision while allowing easy swapping of different insert types.
Data Source
AI summary
A buffer tube cover assembly includes a cover base assembly and an insert attached to a rear side of the cover base assembly. The cover base assembly includes a cover tube, a lever, a buffer locating portion, a spring, and at least one pin. The insert includes at least one forward protruding member disposed inside the cover base assembly.