Firearm and scope alignment
Assignee90° True North, LLC
InventorD'Arcy Echols
Life of this patent
Estimating the term…
Abstract
Systems for leveling a firearm receiver and aligning a scope to the receiver are precisely fabricated and assembled to maximize accuracy, including high sensitivity spirit levels. A bar assembly with a high sensitivity spirit level is received in the receiver with the bar in direct contact with the receiver rails. The bar may directly contact the full length of the receiver rails. A plate assembly includes a lower plate for connection to a bench rest, an upper plate for connection to the receiver, and a mechanism to pivot the upper plate relative to the lower plate about a pivot axis for windage adjustment. Methods of use are disclosed.
Claims20
A system for leveling a firearm receiver, wherein the receiver comprises a central longitudinal axis, a cavity, an ejection window, and a magazine window, wherein the cavity extends longitudinally into a back end of the receiver and comprises a first planar datum surface that is parallel to the central longitudinal axis, wherein the ejection window extends into the cavity through an upper portion of the receiver between an ejection window front wall and an ejection window back wall, wherein the magazine window extends into the cavity through a bottom side of the receiver between a magazine window front wall and a magazine window back wall, the system comprising:
- a bar assembly comprising a bar and a first level, wherein the bar assembly is removably connectable to the receiver;
- wherein the bar extends between a front end and an opposite back end, wherein the bar comprises a second planar datum surface that extends between the front and back ends;
- wherein the first level is fixed to the bar and is level with respect to the second planar datum surface;
- wherein when the bar assembly is connected to the receiver, the first and second planar datum surfaces are in direct contact, the bar front end is in front of the ejection window front wall or the magazine window front wall, and the bar back end is behind the ejection window back wall or the magazine window back wall.
A system for leveling a firearm receiver, wherein the receiver comprises a central longitudinal axis and a cavity, wherein the cavity extends longitudinally into a back end of the receiver and comprises a first planar datum surface that is parallel to the central longitudinal axis, wherein the first planar datum surface extends between a first front edge and an opposite first back edge, wherein a first distance extends parallel to the central longitudinal axis between the first front and back edges, the system comprising:
- a bar assembly comprising a bar and a first level, wherein the bar assembly is removably connectable to the receiver;
- wherein the bar comprises a second planar datum surface that extends between a second front edge and an opposite second back edge;
- wherein the first level is fixed to the bar and is level with respect to the bar second planar datum surface;
- wherein when the bar assembly is connected to the receiver, the first and second planar datum surfaces are in direct contact, a second distance extends parallel to the central longitudinal axis between the second front and back edges, wherein the second distance is at least 50% of the first distance.
A method of leveling a firearm receiver, wherein the receiver comprises a central longitudinal axis, a cavity, an ejection window, and a magazine window, wherein the cavity extends longitudinally into a back end of the receiver and comprises a first planar datum surface that is parallel to the central longitudinal axis, wherein the ejection window extends into the cavity through an upper portion of the receiver between an ejection window front wall and an ejection window back wall, wherein the magazine window extends into the cavity through a bottom side of the receiver between a magazine window front wall and a magazine window back wall, the method comprising the steps of:
- providing a bar assembly comprising a bar and a first level, wherein the bar extends between a front end and an opposite back end, and comprises a second planar datum surface that extends between the front and back ends, wherein the first level is fixed to the bar and is level with respect to the second planar datum surface, wherein the first level comprises a first bubble;
- coupling the bar assembly to the receiver so that the first and second planar datum surfaces are in direct contact, the bar front end is in front of the ejection window front wall or the magazine window front wall, and the bar back end is behind the ejection window back wall or the magazine window back wall;
- and
- adjusting the orientation of the receiver so that the first bubble is centered in the first level.
Dependencies are inferred from the claim text.