Firearm Hand Guard Mounting via Expansion Collar Compression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hand guards for firearms, such as the M16 and M4 rifles, face issues with unreliable mounting mechanisms that can deform the barrel, affecting accuracy and requiring lengthy installation times, while also not allowing for quick and efficient attachment of accessories.
Innovation Solution
A hand guard design featuring an elongated tubular housing with an expansion collar and adjustable screws that compress between radial surfaces on the barrel, ensuring secure mounting without deformation and allowing for easy accessory attachment via Picatinny rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complicated mounting mechanisms are used to securely attach the hand guard to the rifle, then the reliability of mounting is improved, but the installation time becomes lengthy and the device complexity increases
Solution Approach 1:
The hand guard assembly is divided into separate components including the hand guard body, expansion collar, and mounting mechanism. This segmentation allows for simplified assembly where each component performs a specific function, enabling quick installation while maintaining secure attachment through the expansion collar that grips the barrel independently.
Solution Approach 2:
The expansion collar incorporates a dynamic expansion mechanism that allows the hand guard to be quickly adjusted from a compressed state for easy installation to an expanded state for secure mounting. This dynamic feature enables rapid deployment without complicated fastening procedures while ensuring reliable attachment.
2Reliability
If mounting forces are applied to the barrel to secure the hand guard, then the hand guard attachment reliability is improved, but the barrel may twist or deform affecting rifle accuracy
Solution Approach 1:
The expansion collar serves as an intermediary component between the hand guard and the barrel. It provides a dedicated gripping interface that applies mounting forces independently of the barrel's structural integrity, distributing the attachment forces through the collar's expansion mechanism rather than directly twisting the barrel, thus maintaining rifle accuracy while ensuring secure hand guard attachment.
Solution Approach 2:
The mounting mechanism applies localized forces through the expansion collar at specific contact points on the barrel, rather than distributing forces that could cause twisting. The collar's design concentrates the attachment forces in controlled locations that do not compromise the barrel's alignment or the rifle's accuracy.
3Adaptability or versatility
If the hand guard design includes accessory mounting rails, then the adaptability for accessories is improved, but the device complexity increases
Solution Approach 1:
The hand guard incorporates universal Picatinny-style accessory rails that provide standardized mounting capability for various accessories. These rails integrate into the hand guard structure as simple elongated slots or raised surfaces, offering multi-functional accessory attachment without requiring complex additional mechanisms, thus enhancing versatility while maintaining design simplicity.
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
The solution provides a quick, reliable, and accurate mounting system for hand guards on firearms, enabling various accessories to be mounted efficiently without compromising the rifle's accuracy, and allows for easy access to the barrel for maintenance.
Implementation Method 1
an expansion mechanism configured to adjustably compress the expansion collar and the lower part of the housing longitudinally between a pair of surfaces respectively disposed at opposite ends of the intermediate portion of the barrel
Data Source
AI summary
Hand guards for firearms and related methods are provided. In one example, a hand guard for a firearm includes an elongated tubular housing having a lumen extending between opposite ends thereof. A hand guard mounting assembly is coupled concentrically to a rear end portion of the housing. The mounting assembly includes a pair of opposing transverse surfaces respectively disposed on opposite sides of a transverse flange located on a front end of a barrel nut extending forwardly from a receiver of the firearm. At least one of the transverse surfaces is longitudinally moveable toward the other transverse surface. A mechanism adjustably urges the at least one transverse surface longitudinally toward the other transverse surface so as to clamp the flange firmly between the two transverse surfaces and such that the barrel of the firearm is disposed concentrically within the lumen of the housing.