Used on 60MM, 81MM and 4.2inch mortars. illumination is derived from a radioactive light source (H₃ GAS)

< SPECIFICATION >
Length 3.5 inch
Height 3.4 inch
Weight 0.3 lb
Power 3 x
Field of View 12°12’
Exit Pupil Diameter 0.15 inch
Effective Focal Length
   Objective 2.362 inch
   Eyepiece 0.784 inch