Lower Receiver Extension Vise Fixture for Fixed-Magazine Maintenance
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Solution Overview
Problem
In jurisdictions where firearms are regulated to have a permanently or semi-permanently fixed magazine, dismantling the magazine to mount a vise block for maintenance is inconvenient and time-consuming for AR-15 or AR-10 style firearms.
Innovation Solution
A firearm lower receiver extension vise fixture comprising a fixture base and neck, allowing attachment to the lower receiver where the pistol grip is mounted, with a sliding mechanism and adjustable collar to secure the firearm extension, enabling easy mounting on a vise without removing the magazine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanently or semi-permanently fixed magazine is installed in the lower receiver, then the firearm complies with jurisdictional regulations, but the user must dismantle the magazine to mount a vise block for maintenance
Solution Approach 1:
The fixture is divided into separate components: a fixture base that attaches to the lower receiver, a fixture neck that extends through the magazine well, and an adjustable collar that secures the vise block. This segmentation allows the magazine to remain installed while the fixture components are positioned to enable vise mounting without removing the magazine.
Solution Approach 2:
The fixture neck acts as an intermediary element that extends through the magazine well opening, allowing the vise block to be mounted on the lower receiver while the magazine remains in place. The adjustable collar serves as another intermediary that secures the fixture neck at the desired position without interfering with the magazine.
2Strength
If the magazine is dismantled to mount a vise block, then the lower receiver can be securely clamped, but the process becomes time-consuming and inconvenient
Solution Approach 1:
The fixture base is pre-configured with attachment features that allow it to be mounted on the lower receiver before the vise block is installed. The fixture neck is designed to extend through the magazine well opening in advance, so that when the vise block is mounted, the entire fixture is already in position to provide secure clamping without requiring magazine removal.
Solution Approach 2:
The fixture neck serves as an intermediary that bridges the gap between the lower receiver and the magazine well opening, allowing the vise block to be securely clamped while the magazine remains installed. This intermediary structure eliminates the need to dismantle the magazine for vise mounting.
3Stability of the object's composition
If a fixed vise mounting structure is used, then the lower receiver can be firmly secured, but the fixture cannot accommodate various firearm types and sizes
Solution Approach 1:
The fixture incorporates dynamic elements including a sliding fixture neck that can be positioned at different locations within the magazine well opening, and an adjustable collar that can be tightened or loosened to accommodate different firearm dimensions. This dynamic design allows the same fixture to be adapted to various firearm types and sizes while maintaining stable vise mounting.
Solution Approach 2:
The fixture allows for parameter changes in its configuration: the fixture neck can be positioned at different locations along the lower receiver, and the adjustable collar can be tightened or loosened to accommodate different magazine well opening sizes. These parameter adjustments enable the fixture to adapt to various firearm types and sizes while maintaining stable vise mounting.
Data Source
AI summary
An apparatus implementable on a firearm includes a fixture base and a fixture neck. The fixture base is configured to be attached to a location on a lower receiver of the firearm where a pistol grip is mounted when the firearm is in operation. The fixture neck is configured to be slidingly received by the fixture base while an extension portion of the firearm traverses through a through hole or hollow of the fixture neck.