Laser precision bore sight assembly

A laser precision bore sight assembly for insertion into the bore of a gun for alignment of the sights and a training system, comprising:

• an elongated bore shaft having a longitudinal axis and adapted to having a proximate end thereof inserted in the gun barrel;
• a compressible cylindrical barrel insert which has a continuous outer surface and which is rotatably mounted to the proximate end of the shaft which continuous outer surface is adapted to resiliently engage the inside wall of the bore of the gun barrel such that the longitudinal axis of the proximate end of the shaft is coaxially aligned with the longitudinal axis of the gun barrel when the shaft is inserted and rotated in the bore of the gun barrel;
• the distal end of the shaft has an alignment cone which increases distally in diameter and which is adapted to engage the peripheral edge of the bore of the gun barrel;
• a laser housing assembly which is coaxially mounted adjacent to the distal end of the shaft and which contains a laser subassembly having laser source which provides a laser beam in a direction coaxial with the longitudinal axis of the shaft;
• wherein the laser housing assembly includes a three point laser alignment mechanism for adjusting the alignment of the laser subassembly so that the laser beam is directed along the longitudinal axes of the shaft and the bore of the gun barrel when the shaft is rotated.

A method of aligning a laser beam along the longitudinal axis of the bore of barrel of a gun, comprising the steps of:

• rotatably mounting a cylindrical barrel insert, which has a flexible outer cylindrical surface, to one end of a bore shaft having a longitudinal axis;
• inserting the cylindrical barrel insert into the bore of the gun barrel having a longitudinal axis and engaging the inside wall of the gun barrel bore with the outer cylindrical surface of the cylindrical barrel insert;
• engaging an alignment cone located at the outer end of the shaft with the outer inside edge of the gun barrel such that the longitudinal axis of the shaft is coaxially aligned with the longitudinal axis of the gun barrel when the shaft is inserted and rotated in the gun barrel;
• mounting a laser housing, which contains a laser source assembly, adjacent to the outer end of the shaft;
• directing a laser beam from the laser source assembly in a direction coaxial with the longitudinal axis of the shaft;
• and
• adjusting a three-point laser alignment mechanism mounted to the universal housing for adjusting the alignment of the laser beam along the longitudinal axes of the shaft and the bore of the gun barrel, even when the shaft is rotated.

An adjustably aligned laser housing assembly, comprising:

• a housing having a first bore formed therein;
• a generally ellipsoidal laser container into which is fixed a laser source for a reference laser beam aligned along a longitudinal axis, said laser container having a maximum diameter dimensioned to contact corresponding inner surfaces of the first bore,
• an O-ring radially positioned around the longitudinal axis of the laser container;
• a three-point laser alignment mechanism for adjusting the alignment of the laser container with respect to the housing, wherein the laser alignment mechanism includes:
• a first adjustable screw, the lower end of which contacts the laser subassembly and which is aligned for movement in a first direction perpendicular to the longitudinal axis of the shaft;
• a second adjustable screw, the lower end of which contacts the laser subassembly and which is aligned for movement in a second direction perpendicular to the longitudinal axis of the shaft and orthogonal to the first direction of movement of the first adjustment screw;
• wherein unthreaded, smooth side surfaces at the lower end of the adjustment screws contact the O-ring to provide friction loading on the ends of the adjustment screws;
• and
• a spring-loaded bushing fixed to a set screw aligned for movement in a direction to bias the laser subassembly against the first and the second adjustment screws.

A laser precision bore sight assembly for bore sight alignment of a laser beam the along longitudinal axis of a gun barrel, comprising:

• an elongated bore shaft having a longitudinal axis and adapted to having a proximate end thereof inserted into the bore of the gun barrel;
• a compressible barrel-shaped insert which is rotatably mounted to the proximate end of the bore shaft and which has a continuous outer surface which is adapted to be inserted in the gun barrel to resiliently engage the inside wall of the gun barrel such that a longitudinal axis of approximate end of the bore shaft is coaxially aligned with the longitudinal axis of the gun barrel;
• at the distal end of the bore shaft is provided a rotational mount for mounting the distal end of the bore shaft to the distal end of the gun barrel to coaxially align a distal end of the bore shaft with the longitudinal gun of the barrel;
• and
• a laser housing assembly which is coaxially mounted to the distal end of the bore shaft and which contains a laser subassembly having a laser source which provides a laser beam in a direction coaxial with the longitudinal axis of the bore shaft.