Hinged Clamshell Hand Guard for Barrel Nut
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Solution Overview
Problem
Existing hand guard installations for firearms often require permanent modification of the firearm and disassembly of the gas block or gas tube for attachment or detachment, which is time-consuming and impractical, especially in combat situations.
Innovation Solution
A hinged clamshell hand guard assembly that can be mounted and removed without modifying the standard barrel nut or disassembling the gas block, using a first and second clamshell component that pivotally connect about a hinge, allowing for easy attachment and detachment while fully supporting the barrel nut, and accommodating the gas tube without additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing hand guard installation methods are used, then secure mounting is achieved, but permanent modification of the firearm and disassembly of the gas block are required
Solution Approach 1:
The hand guard is divided into two separate clamshell components that can be assembled around the barrel without modifying the firearm. The first clamshell component wraps around the front portion while the second component wraps around the rear portion, allowing the hand guard to be installed as a complete assembly rather than requiring permanent firearm modification.
Solution Approach 2:
The clamshell components are designed to nest around the barrel and gas tube assembly. The first clamshell component receives the second clamshell component, creating a layered structure that accommodates the firearm components without requiring their disassembly or modification.
2Reliability
If existing hand guard installation methods are used, then secure mounting is achieved, but disassembly of the gas block or gas tube is required
Solution Approach 1:
The hand guard assembly is pre-configured with the two clamshell components positioned to accommodate the barrel and gas tube. The components include pre-formed receiving channels and monorails that align with standard firearm dimensions, allowing the assembly to be mounted without requiring disassembly of the gas block or gas tube.
3Ease of operation
If the hand guard is designed to be easily removable, then quick detachment is achieved, but secure mounting may be compromised
Solution Approach 1:
The hand guard assembly incorporates dynamic elements including a hinged connection between the two clamshell components and a snap-fit mechanism with retaining arms. These features allow the assembly to be securely mounted when closed but can be quickly released by actuating the release mechanism, providing both secure mounting and easy removal.
4Ease of operation
If a hinged clamshell design is used, then easy attachment and detachment are achieved, but additional structural complexity is introduced
Solution Approach 1:
The hinge connection and snap-fit mechanism are integrated into the clamshell components themselves rather than being separate assemblies. The retaining arms are formed as integral parts of the clamshell components, and the monorail and receiving channel features are built into the molding of the components, reducing the number of separate parts while maintaining the quick-attach functionality.
Data Source
AI summary
A hand guard assembly for installation on a standard barrel nut is disclosed. In accordance with some embodiments, the hand guard assembly may include a hinged hand guard comprising a left clamshell component and a right clamshell component, which may be mounted on a standard barrel nut. The design of the hinged hand guard allows the hand guard to securely fasten on the standard barrel nut by accommodating the sprockets of the standard barrel nut in an internal radial groove, and/or encasing the firearm's gas tube in a longitudinal notch. The disclosed configurations may allow a user to attach and remove the hand guard easily and quickly from the firearm without modifying the standard barrel nut or removing the gas block.