Product Overview:
M1A1 Collimator
NSN: 1240-00-332-1780
P/N: 10556235
M1A2 Collimator
NSN: 1240-01-465-5452
P/N: 12984644

General Description
For use with the M102 Light, Towed Howitzer; M110A2 Heavy, Self-Propelled Howitzer, 8 inch; M109A2/A3 Howitzer, 155mm, M119 Light-Weight Howitzer.

The M1A1 Collimator is the primary aiming reference point for indirect laying operations. It is usually stored in its storage case. The reticle pattern, which is radioactively illuminated, is wipe tested.

The Collimator Scope M1A2 is illuminated with a battery pack -- two (2) C cell lithium batteries -- with a ultra-low power light emitting diode (LED). The battery pack is preset with a 12-hour timer to extend battery life.