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 an unfinished firearm lower receiver blank, the blank having a buffer tube and a rear takedown aperture, the jig assembly comprising:
- a pair of side plates adapted to be positioned on opposed sides of the blank to capture the blank therebetween;
- a template plate comprising:
- a first end;
- a second end;
- a machining aperture disposed between the first end and the second end;
- and
- a pin connection on the second end;
- a centering mechanism comprising:
- a central cylinder;
- a first tab;
- a second tab;
- and
- a buffer screw;
- wherein in a first configuration, the centering mechanism is attached with the first end of the template plate in a first orientation and the buffer screw is coupled within the buffer tube of the blank through the central cylinder, the first orientation providing a first positioning of the blank relative to the machining aperture;
- wherein in a second configuration, the centering mechanism is attached with the first end of the template plate in a second orientation and the buffer screw is coupled within the buffer tube of the blank through the central cylinder, the second orientation providing a second positioning of the blank relative to the machining aperture, the second positioning being different than the first positioning to accommodate differently sized blanks.
A jig assembly for machining an unfinished firearm lower receiver blank, the blank having a buffer tube and a rear takedown aperture, the jig assembly comprising:
- a pair of side plates adapted to be positioned on opposed sides of the blank to capture the blank therebetween;
- a template plate including a machining aperture and a pin connection configured to couple with the rear takedown aperture of the blank;
- a centering mechanism including a buffer screw configured to couple with the buffer tube;
- wherein the centering mechanism is attachable with a first end of the template plate and is reversible between first and second configurations, the first orientation providing a first positioning of the blank relative to the machining aperture and the second orientation providing a second, different, positioning of the blank relative to the machining aperture to accommodate differently sized blanks.
Dependencies are inferred from the claim text.