Compact Firearm Action With Forward Charging Handle and Fixed Ejector
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Solution Overview
Problem
Existing firearm action assemblies, particularly in AR style platforms, face inefficiencies in bolt cycling and cartridge ejection mechanisms, often relying on traditional buffer tubes and spring-loaded ejectors that can be cumbersome and require redesigns to improve functionality.
Innovation Solution
A compact action assembly is integrated into a firearm upper receiver, featuring a forward-positioned charging handle, proprietary buffer retention components, and a fixed ejector attached to the upper receiver, with machined channels in the carrier and bolt to enhance bolt cycling and ejection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional buffer tubes and spring-loaded ejectors are used in AR style platforms, then the ejection function is provided, but the device complexity and operational reliability are reduced
Solution Approach 1:
The patent removes the traditional buffer tube and spring-loaded ejector components from the AR platform, extracting only the essential ejection function. The buffer tube is eliminated entirely, and the spring-loaded ejector is replaced with a fixed ejector that is simpler in design but maintains the core ejection capability.
Solution Approach 2:
Instead of using a spring-loaded mechanism that actively propels the ejector forward, the patent inverts the approach by using a fixed ejector that relies on the rearward motion of the bolt carrier group to accomplish ejection. The spent casing is pushed against the fixed ejector by the rearward-moving bolt, which then deflects the casing outward without requiring an active spring mechanism.
2Ease of operation
If traditional AR action assemblies are used, then bolt cycling is achieved, but the mechanism is cumbersome and requires redesign for improved functionality
Solution Approach 1:
The patent merges the charging handle mechanism with the handguard assembly, integrating these previously separate components into a unified structure. The charging handle is positioned forward and becomes part of the handguard assembly, reducing the number of separate parts and simplifying the overall action assembly.
Solution Approach 2:
The action assembly is segmented into distinct functional modules: the bolt carrier group, the fixed ejector, the charging handle assembly, and the handguard. This segmentation allows each component to be optimized independently while maintaining overall simplicity and ease of operation.
3Productivity
If fixed ejector with machined channels is used, then ejection efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The machined channels in the bolt and carrier are localized to specific areas where they are needed for ejection efficiency, rather than requiring precision machining throughout the entire components. The channels are strategically positioned to guide spent casings toward the fixed ejector, providing improved ejection only where necessary.
Data Source
AI summary
A compact action for a firearm including an upper receiver housing incorporating a barrel. A bolt and carrier are positioned within the receiver housing so that the bolt is engaged to a rear receiver end of the barrel in a cartridge chambering position. Guide rods are supported within the housing above the barrel and extend in parallel to a rear located end plate. The carrier includes a carrier key supported by and displaceable along the guide rods between the barrel and a rearward bumper component. A gas tube extends from a forward located gas block overlaying a gas discharge aperture in the barrel to a gas key for actuating the carrier rearwardly following discharge of a ballistic from the barrel. A fixed ejector is attached to the upper receiver, in combination with machining a slot into the carrier and the bolt, such that the ejector remains static such that, upon the bolt cycling, the spent shell casing contacts the ejector, causing it to be ejected out of the upper receiver.