Firearm Chassis With Pivoting Sights And Split Handguard
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Solution Overview
Problem
Existing firearm rail systems often interfere with the use of iron sights, preventing their simultaneous use with additional components due to the fixed nature of rail-mounted sights, which block the rail and hinder component attachment.
Innovation Solution
A chassis system with a handguard that includes a split rear end for easy mounting over the barrel support member, allowing for a free-floating handguard installation, and embedded sights that pivot between raised and lowered positions to avoid interfering with rail usage, enabling the attachment of various components without obstructing the rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed iron sights are mounted on the rail system, then the sights provide a reliable aiming reference, but the sights block the rail and prevent attachment of additional components
Solution Approach 1:
The patent implements movable iron sights that can pivot between a raised position for aiming and a lowered position that clears the rail surface. This dynamic positioning allows the sights to be out of the way when not in use, enabling attachment of components like lasers, lights, and other accessories to the rail without obstruction.
Solution Approach 2:
The sight system is segmented from the rail structure, with the sights mounted on a separate pivot mechanism rather than being fixed directly to the rail. This segmentation allows the sights to be independently positioned and does not permanently obstruct the rail surface, maintaining both aiming functionality and component attachment capability.
2Strength
If a handguard is mounted using traditional methods requiring an enlarged barrel nut, then the handguard attachment is secure, but the mounting process becomes difficult and complex
Solution Approach 1:
The patent introduces a chassis as an intermediary component between the receiver and the handguard. The chassis includes a receiver cavity that receives the receiver and a handguard mounting surface that provides a standardized interface for attaching the handguard. This intermediary structure simplifies the mounting process by eliminating the need for enlarged barrel nuts while maintaining secure attachment.
Solution Approach 2:
The chassis serves multiple functions: it provides the receiver cavity for mounting the receiver, creates a standardized handguard mounting interface, and establishes a platform for attaching various accessories. This multi-functional design simplifies handguard installation while maintaining attachment strength and enabling versatile component mounting.
3Adaptability or versatility
If the rail system is designed to accommodate multiple components, then the versatility is improved, but the complexity of the rail system increases
Solution Approach 1:
The patent divides the firearm system into distinct functional segments: the chassis provides the structural platform, the top rail provides the attachment interface, and the embedded sights provide the aiming function. This segmentation allows each component to be optimized independently while maintaining overall simplicity and versatility.
Solution Approach 2:
The patent merges the handguard and the rail system into a unified structure, with the top rail extending along the handguard and integrated into the overall design. This merging reduces the number of separate components and simplifies the overall system while maintaining the ability to attach multiple components through standardized interfaces.
Data Source
AI summary
A chassis system and firearm including a chassis having a forward end terminating in a barrel support member, a rearward end, and a cavity defined by the chassis intermediate the forward end and the rearward end. A receiver with attached barrel is received in the cavity, and the barrel is received in the barrel support member. A handguard including a rearward end having a split therein and movable between a normally expanded configuration and a contracted configuration is carried over and encircling the barrel. The rearward end is slidably received over the barrel support member in the expanded configuration and securely engaged to the barrel support member in the contracted configuration.