M154 Alignment Device: Details
The M154 Alignment Device, used in conjunction with the M137A2 Panoramic Telescope, verifies the boresight of the M777 howitzer. Boresighting is the means to ensure the optical fire control is properly aligned with the axis of the cannon tube. When following the specified steps, the M137A2 PanTel and M154 Alignment Device will confirm boresight of the weapon. The reticle on the M154 is illuminated with a battery powered LED.
The M154 is used with the M777 Light Weight Howitzer, 155mm.