Spring Tensioned Locking Shoe Rail Interface
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Solution Overview
Problem
Existing rail interface systems for small firearms, such as M-Lok, require specialized fasteners for secure attachment of accessories, which can be cumbersome and add bulk to the handguard, whereas Picatinny systems have inefficiencies in barrel ventilation and weight due to full-length rail slots.
Innovation Solution
A rail interface system utilizing spring tensioned 'locking' shoes that extend into rail openings to securely engage the edges, eliminating the need for specialized nuts and providing a quick, integrated connection compatible with M-Lok style rail openings without additional fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If M-Lok rail interface system is used with specialized fasteners, then secure attachment of accessories is achieved, but device complexity and bulk increase
Solution Approach 1:
The locking shoe integrates the fastening function directly into the accessory mounting interface, combining the accessory attachment and rail engagement into a single integrated component rather than requiring separate specialized fasteners
Solution Approach 2:
The locking shoe extracts the essential fastening function from the complex specialized fastener system, using only the necessary elements (locking surfaces and engagement geometry) to achieve secure attachment without extraneous components
2Adaptability or versatility
If Picatinny rail slots are used along the whole length, then accessory mounting versatility is improved, but weight and bulk increase
Solution Approach 1:
The rail interface is segmented into discrete M-Lok openings distributed along the handguard, allowing accessories to be mounted only where needed rather than requiring continuous full-length rail slots, thereby reducing overall material usage and weight
Solution Approach 2:
The handguard structure transitions from uniform full-length rail slots to localized M-Lok openings with varying distributions, allowing different sections to have different mounting capabilities based on specific operational needs, optimizing the balance between versatility and weight
3Shape
If M-Lok rail openings are used without full rail coverage, then handguard slimmer design is achieved, but attachment security may be compromised
Solution Approach 1:
The locking shoe employs asymmetric engagement geometry with cammed locking surfaces that provide directional locking force, allowing the shoe to securely engage the M-Lok opening in one direction while maintaining a slimmer overall profile through optimized material distribution
Solution Approach 2:
The locking shoe incorporates preliminary engagement features that guide the accessory into proper alignment before final locking occurs, ensuring secure attachment even with reduced rail coverage by pre-positioning the locking surfaces for optimal engagement
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 offers a slimmer, lighter, and more efficient attachment method that securely mounts accessories directly to the rail, enhancing compatibility and reducing bulk, while maintaining secure engagement without the need for separate fasteners, thus improving the overall design and functionality of rail interface systems.
Implementation Method 1
spring tensioned 'locking' shoes that extend into rail openings
Data Source
AI summary
The improved rail interface system uses a spring tensioned “locking” shoe that extends from the accessory body into the rail opening to restrictively engage the edges of the rail openings and hold the weapon accessory against the weapon or weapon component. The locking shoe mechanisms is incorporated into a weapon light mount but may be adapted for use with M-Lok® style rail openings without the use of specialized nuts and fasteners.