TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9-2350-311-10 2-12 PREPARATION FOR FIRING — CONTINUED 2-12.2 Boresighting — Continued g. Boresighting — Distant Aiming Point Method — Continued M117/M117A2 PANORAMIC TELESCOPE PATTERN 2-191