TM 1-1500-204-23-6
ZERO SIGHTS (ZERO COMMANDER'S PERISCOPE TO CALIBER .50 MACHINE GUN) - Continued
CAUTION
Steps 39 thru 46 should be done at dusk or during
darkness to prevent damage to M36E1 periscope.
NOTE
If vehicle power is not available, use M30 instrument
light (page 2-360.4)
39.
Move shutter lever (AM) left to turn on passive elbow and open
shutter.
TA252817
Change 1 2-468
