by smprecision | Jan 25, 2023
NSN: 4931-01-472-6621 P/N: 11741648-3 General Description The M139A1 Alignment Device, used in conjunction with the M137A3 Panoramic Telescope, verifies the boresight of the M198 howitzer. Boresighting is the means to ensure the optical fire control is properly...
by smprecision | Jan 25, 2023
NSN: 1240-01-515-8264 P/N: 13005104 General Description The M138A1 Elbow Telescope is an 8-power, 8-degree field of-view instrument. An elevation reticle is provided for direct fire and a cursor reticle provides for range settings on the mil scale reticle. Both...
by smprecision | Jan 25, 2023
M171A1 Telescope Mount: Details NSN: 1240-01-515-8265 P/N: 13005103 General Description The M171A1 Telescope Mount holds and supports the M137 Panoramic Telescope and the M17A1 Fire Control Quadrant. The mount provides an adjustable base for leveling the panoramic...
by smprecision | Jan 25, 2023
M172A1 Telescope Mount: Details NSN: 1240-01-517-2171 P/N: 13005089 General Description The M172A1 Telescope Mount is used to hold and support the M138A1 Elbow Telescope and M18A1 Fire Control Quadrant. The mount includes a vertical surface for measuring weapon...
by smprecision | Jan 25, 2023
M18A1 Fire Control Quadrant: Details NSN: 1290-01-515-8262 P/N: 13005102 General Description The M18A1 provides the primary means for adjustment of the howitzer in elevation. The M18A1 is secured beneath the M138A1 Elbow Telescope on the M172 Telescope Mount. The...
