M2/M3 BFV: FIRE CONTROL SYSTEM - OD1608 - LESSON 1/TASK 2
telescope. The boresight telescope should not be
jammed into the boresight adapter.
(5) The boresight adapter and boresight telescope must now be
installed in the coaxial machinegun barrel (figure 16). First, push
the boresight adapter into the coaxial machinegun barrel.
gently push the shank of the boresight telescope into the boresight
adapter. Turn the boresight telescope so that the eyepiece is at the
top. When the telescope is properly installed, a red streamer should
be hung on the boresight adapter.
INSTALLING THE BORESIGHT ADAPTER AND TELESCOPE IN
THE MACHINEGUN BARREL.
(6) Focus the boresight telescope on target by looking into the
eyepiece and moving the vernier focus dial (figure 17 on the
following page) up or down and rotating the eyepiece.