Jig for firearm lower receiver manufacture
AssigneeBlackHawk Manufacturing Group Inc.
InventorTilden Alan Smith
Life of this patent
Estimating the term…
Abstract
A machining tool assembly is provided for machining a blank to form a firearm lower receiver. The assembly includes a pair of side plates positionable on opposed sides of the blank to capture the blank therebetween. A template plate having a template aperture is adapted to be removeably attachable to the side plates. The template aperture is aligned with a top surface of the blank and is adapted for machining a cavity within the blank having a peripheral contour complimentary to a peripheral contour of the template aperture. A centering mechanism is adapted to be removeably attachable to the template plate, with the centering mechanism including an opening aligned with a corresponding void formed on the blank to align the blank with the template plate.
Claims19
A jig assembly for machining portions of a blank of an unfinished firearm lower receiver, the blank having a buffer tube and a rear takedown aperture, the jig assembly comprising:
- a template plate having a machining aperture and a pin aperture, the pin aperture configured to couple the blank with the template plate by the rear takedown aperture;
- a centering mechanism configured to removably attach to the template plate and laterally center the template plate relative to the blank, the centering mechanism including an opening configured to align with a laterally centered void on the blank;
- and
- at least one side plate extending from the template plate, the at least one side plate configured to support the template plate and the blank on a surface and including alignment features.
A jig assembly for machining portions of a blank of an unfinished firearm lower receiver, the blank having a buffer tube and a rear takedown aperture, the jig assembly comprising:
- a template plate having a machining aperture and a pin aperture, the pin aperture configured to couple the blank with the template plate by the rear takedown aperture;
- a centering mechanism configured to removably attach to the template plate, the centering mechanism including an opening configured to align with a void on the blank;
- and
- at least one side plate extending from the template plate, the at least one side plate configured to support the template plate and the blank on a surface and including alignment features,
- wherein an alignment insert is configured to be insertable through the opening in the centering mechanism and the void in the blank to align the blank with the template plate;
- and
- wherein the alignment insert comprises external threads adapted to engage an internal thread of a buffer opening of the blank.
Dependencies are inferred from the claim text.