Sliding Lock Collar Barrel Coupling for Tool-Less Rifle Take-Down
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Solution Overview
Problem
Existing firearms, such as AR-15, AR Pistols, and M16 rifles, require specialized tools and a workbench for disassembly and reassembly of the rifle barrel from the upper receiver, and existing tool-less systems are not robust, complicated, or do not support standard MILSPEC accessories.
Innovation Solution
A quick-take down mechanism featuring an upper receiver coupling with rotationally offset gas tube tunnels, a sliding lock collar, and a barrel coupling that allows for tool-less disassembly and reassembly, ensuring compatibility with standard MILSPEC accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional firearm assembly methods are used, then the connection is strong and reliable, but disassembly and reassembly require specialized tools and a workbench
Solution Approach 1:
The coupling mechanism is divided into distinct segments: an upper receiver coupling with external threads, a barrel coupling with internal threads, and a sliding lock collar with locking elements. This segmentation allows each component to perform its specific function independently while enabling tool-less operation through the sliding collar that moves locking elements between engaged and disengaged positions.
Solution Approach 2:
The locking mechanism transitions from a static threaded connection to a dynamic system where the sliding lock collar can move axially to engage or disengage locking elements. This dynamic capability allows the user to quickly switch between locked and unlocked states without tools, while the threaded portions maintain strong connection when locked.
2Ease of operation
If traditional firearm assembly methods are used, then the connection is secure, but the process requires specialized tools and equipment
Solution Approach 1:
The design merges two connection methods: threaded engagement for secure attachment and positive locking elements for reliable retention. The locking elements engage with corresponding features on the barrel coupling to prevent rotation and maintain secure connection, while the threaded portions provide the primary attachment force. This combination achieves both ease of operation and connection reliability.
3Ease of operation
If existing tool-less disassembly systems are used, then specialized tools are not required, but the systems are not robust or are complicated
Solution Approach 1:
The locking elements are pre-positioned within the coupling mechanisms, ready to engage immediately when the sliding lock collar is moved to the locked position. The threaded portions are pre-configured to automatically engage when components are brought together, eliminating the need for tools while ensuring robust connection through the preliminary positioning of all locking features.
4Ease of operation
If existing tool-less disassembly systems are used, then specialized tools are not required, but the systems are complicated to use
Solution Approach 1:
The complex internal locking mechanism is extracted and simplified by using a sliding lock collar that externally controls the locking elements. The user only needs to slide the collar to operate the system, while the internal threading and locking features automatically perform their functions without user intervention. This extraction of complexity from the user interface maintains simplicity while enabling robust operation.
Data Source
AI summary
Quick take-down firearms and methods of using quick-take down firearms. The quick-take down includes an upper receiver coupling and a barrel coupling. The quick take-down can be unlocked by sliding a sliding lock collar in a translational motion to an unlocked position to release locking elements from a locked configuration. In the unlocked position, a barrel and handguard may be installed onto and removed from the upper receiver of the firearm. Releasing the sliding lock collar returns it to a locked position, securing the barrel and handguard to the upper receiver.