Bore sight KM45A1 is essentially a fixed-focus telescope adapted for use to aline axis of the bore of the 60MM, 81MM, 105MM and 4.2 inch mortarswith a distant aiming point.

< SPECIFICATION >
Length 4^1/2 inch
Width 4 inch
Height 4^3/4 inch
Weight 2^1/2 lb
Power 4 X
Field of View 10°
Exit Pupil Diameter 0.15 inch
Effective Focal Length
   Objective 3.200 inch
Clear Eye Distance 0.560 inch