Monolithic Hand Guard Attachment for Firearm Barrel Access
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Solution Overview
Problem
Conventional firearms with integral upper receivers and hand guards impede the removal and replacement of barrels, limiting accessibility and complicating maintenance and accessory mounting.
Innovation Solution
A monolithic rail/hand guard attachment system that is removably connected to the firearm's receiver, featuring a cinch block and tension block configuration, allowing for easy mounting and securing of accessories without requiring substantial modification to the existing receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hand guard is integrated with the upper receiver, then the structural strength and rigidity are improved, but the accessibility to the barrel nut and ease of barrel removal are worsened
Solution Approach 1:
The hand guard assembly is divided into separate components: the hand guard itself and the forearm assembly that attaches to the receiver. This segmentation allows the hand guard to remain structurally integrated while the forearm assembly can be independently removed to access the barrel nut, resolving the contradiction between structural strength and accessibility.
Solution Approach 2:
The forearm assembly containing the barrel nut access pathway is extracted as a separate removable component from the main receiver structure. This extraction enables direct access to the barrel nut without compromising the integrity of the integrated hand guard-upper receiver assembly.
2Stability of the object's composition
If the hand guard is integrated with the upper receiver, then the structural stability is improved, but the modularity and ease of maintenance are worsened
Solution Approach 1:
The firearm system is segmented into maintainable modules: the upper receiver with integrated hand guard remains stable, while the forearm assembly is a separate module that can be removed for maintenance activities such as barrel cleaning and barrel replacement, improving ease of repair without compromising structural stability.
Solution Approach 2:
The forearm assembly is pre-configured with barrel nut access pathways and mounting interfaces, allowing maintenance personnel to quickly perform maintenance operations without disassembling the entire firearm or compromising the stable upper receiver assembly.
3Ease of manufacture
If conventional fasteners are used to attach the hand guard, then the manufacturing simplicity is improved, but the device complexity and number of parts increase
Solution Approach 1:
The hand guard and forearm assembly are merged into a single integrated unit that attaches to the receiver as one component. This merging reduces the total number of separate parts and fasteners required, simplifying both manufacturing and assembly while maintaining the necessary functional complexity for accessibility and modularity.
Solution Approach 2:
The forearm assembly serves multiple functions: it provides structural support, enables barrel nut access, and offers mounting surfaces for accessories. This multi-functionality reduces the need for separate components for each function, thereby reducing overall device complexity while maintaining ease of manufacture.
Data Source
AI summary
A hand guard attachment assembly for a firearm having a barrel and a receiver fastened to the barrel by a barrel nut. The hand guard attachment assembly includes a forearm having a monolithic mounting rail/hand guard that is removably connected to the receiver. The monolithic rail/hand guard interfaces with an integral multi-slot mounting portion of the receiver. A cinch block is mated to the slots of the receiver and held in place by the monolithic rail/hand guard. A tension block is mated at one end of the monolithic rail/hand guard and is attached to the cinch block by a fastener to securely hold the monolithic rail/hand guard in place.