Modular Rifle Design with Skewed Recoil Bore
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Solution Overview
Problem
Traditional sporting and patrol rifles lack modularity, durability, and interchangeability of components, making them less suitable for all-weather conditions and versatile use, while 'assault rifles' face bans due to physical features, affecting law enforcement and civilian access to reliable firearms.
Innovation Solution
A modular non-assault rifle design that combines the reliability and modularity of military rifles with a traditional appearance, featuring separable receiver bodies, a bolt carrier group, and a stock configuration that allows for interchangeable components, enhancing usability in sporting and law enforcement roles without intimidating aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional sporting rifles are designed with fine metal finishes and attractive features, then aesthetic appeal is improved, but durability under poor weather conditions and hard use deteriorates
Solution Approach 1:
The rifle is divided into modular components including barrel assemblies, receiver groups, and stock assemblies that can be independently selected and interchanged. This allows the aesthetic appearance to be customized through component selection while maintaining durable, weather-resistant materials and finishes on each individual component.
Solution Approach 2:
The rifle employs universal interfaces and standardized mounting systems that allow the same receiver group to accommodate multiple barrel assemblies with different aesthetic finishes and styles. This enables the system to provide both durable performance and varied aesthetic appeal through component interchangeability.
2Manufacturing precision
If traditional sporting rifles are manufactured with hand-fitted components, then assembly precision is improved, but interchangeability and availability of replacement components deteriorates
Solution Approach 1:
The rifle is segmented into distinct modular assemblies (barrel, receiver, stock) that are manufactured with precision interfaces allowing them to be hand-fitted during initial assembly while maintaining the capability for interchangeability. Each module can be independently replaced or upgraded without requiring custom fitting of the entire rifle.
Solution Approach 2:
Universal receiver groups are designed with standardized interfaces that can accommodate multiple barrel assemblies and stock configurations. This allows precision-machined receiver groups to serve multiple functions while enabling easy interchangeability of components through standardized mounting systems.
3Ease of operation
If assault rifles are designed with features suitable for military combat, then operational effectiveness is improved, but acceptance for law enforcement and sporting purposes deteriorates due to intimidating appearance
Solution Approach 1:
The rifle separates combat-critical functions ( housed in the receiver group) from aesthetic elements (barrel and stock assemblies). This allows the receiver to maintain military-grade operational effectiveness while the interchangeable barrels and stocks can be selected to provide non-intimidating appearances suitable for law enforcement and sporting applications.
Solution Approach 2:
The universal receiver group serves multiple roles by accommodating both military-style and traditional sporting barrel assemblies. This enables a single receiver design to support both high-performance combat operations and civilian applications with varied aesthetic requirements through component interchangeability.
4Reliability
If military rifles use plastics and lightweight alloy metals, then durability and lighter weight are improved, but traditional aesthetic appeal deteriorates
Solution Approach 1:
The rifle divides structural components requiring durability (receiver, bolt carrier) from aesthetic components (barrel, stock). This allows the use of durable plastics and lightweight alloys in the receiver and internal mechanisms while traditional aesthetic materials and finishes can be applied to the visible barrel and stock assemblies.
Solution Approach 2:
The universal receiver group provides a platform that supports both modern durable materials and traditional aesthetic materials. This enables the system to achieve durability through lightweight alloys and plastics in critical structural areas while maintaining traditional aesthetic appeal through conventional materials in visible components.
Data Source
AI summary
A rifle includes an upper receiver body, a lower receiver body detachably attached to the upper receiver body, a stock and a bolt carrier group. The upper receiver body has a bolt carrier receiving bore exposed at a stock engaging portion thereof. The stock includes a recoil spring receiving bore therein exposed at a mounting portion thereof. The mounting portion of the stock is engaged with the stock engaging portion of the lower receiver body in a manner whereby the recoil spring receiving bore is accessible from the bolt carrier receiving bore. A centerline axis of the recoil spring receiving bore is skewed with respect to a centerline axis of the bolt carrier receiving bore. The bolt carrier group has a bolt carrying structure slideably disposed within the bolt carrier receiving bore, a recoil spring engaging structure slideably disposed within the recoil spring receiving bore and a linkage member structure pivotably engaged between the bolt carrying structure and the recoil spring engaging structure.