Firearm Upper Receiver Segmentation for Modular Customization
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Solution Overview
Problem
Current firearms face a trade-off between reliability and accuracy, with designs like the AK-47 prioritizing ruggedness and simplicity over precision, while the AR-15's accuracy is compromised by potential fouling and increased maintenance needs.
Innovation Solution
A firearm system with an integrated upper receiver that allows the gas cylinder to float freely, reducing pressure transfer and incorporating a gas piston system with a valve for adjustable propellant gas entry, along with an ambidextrous charging handle and magazine latch for improved reliability and maintainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional firearms are designed with fixed barrel configurations, then manufacturing and inventory management are simplified, but customization for different shooting applications becomes difficult
Solution Approach 1:
The firearm system is divided into separate modular components: a permanent lower receiver and interchangeable upper receivers. Each upper receiver contains specific components (barrel, chamber, bolt carrier group) that can be independently selected and swapped based on shooting application, allowing customization without redesigning the entire firearm.
Solution Approach 2:
The lower receiver is designed as a universal platform that can accommodate multiple types of upper receivers through standardized interfaces. This single lower receiver can be configured for different calibers, barrel lengths, and firearm types (rifle/shotgun) by simply changing the upper receiver assembly.
2Ease of operation
If firearms require complete disassembly for cleaning and maintenance, then thorough cleaning is achieved, but time and complexity increase
Solution Approach 1:
The upper receiver assembly is segmented into field-removable components including the barrel, bolt carrier group, and magazine. Users can quickly detach and clean these specific components without disassembling the entire firearm, enabling targeted maintenance of soiled parts while leaving clean components assembled.
Solution Approach 2:
Specific components that require frequent cleaning (barrel, bolt carrier group) are designed to be easily extracted from the upper receiver assembly. This allows users to remove and clean only the contaminated parts while maintaining the assembled state of the entire firearm for storage and transport.
3Strength
If firearms are designed as integrated units, then structural integrity is maximized, but adaptability and customization are limited
Solution Approach 1:
The firearm is segmented into permanently bonded lower receiver and interchangeably attached upper receivers. The permanent bonding (welding, brazing, or adhesive bonding) ensures structural integrity of the lower receiver, while the interchangeable upper receivers maintain strength through precision-machined interfaces and secure attachment mechanisms.
Solution Approach 2:
The upper receiver components (barrel, bolt carrier group, magazine) are nested within the upper receiver housing, which itself attaches to the lower receiver. This nested arrangement maintains structural coherence while allowing the outermost layer (upper receiver) to be changed for different configurations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances accuracy and reliability by reducing harmonic vibrations, simplifying maintenance, and allowing for adjustable firing modes, while maintaining a lightweight and cost-effective design.
Implementation Method 1
directing exhaust gases into a cylinder/piston assembly... Instead of directing exhaust gases into a cylinder/piston assembly, the AR-15 rifle includes a self-loading mechanism actuated by the venting of a metered portion of propellant gases
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A firearm is described herein. The firearm comprises a receiver assembly adapted to receive a cartridge, a bolt assembly including a firing device operable to fire the cartridge, a barrel adapted to receive the projectile after the cartridge is fired, and a gas assembly including a gas tube. The receiver assembly includes an upper receiver portion, a lower receiver portion, and an upper receiver cover. The upper receiver portion defines a longitudinal axis, and an indexing slot operable to receive the gas tube. The upper receiver portion includes at least one integrated exterior track extending generally parallel to the longitudinal axis adapted to slidably couple with the upper receiver cover and a plurality of interior tracks extending generally parallel to the longitudinal axis adapted to slidably couple with the bolt assembly. The upper and lower receiver portions are pivotally connected to one another.