TM-9-1290-262-24&P Technical Manual for M2A2 Aiming Circle Download
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SECTION II ARMY TM 9-1290-262-24&P MARINE CORPS TM 00476C-24&P AIR FORCE TO 49A7-3-72/74 Figure C-7. Aiming Circle, M2A2 (Identification and Instruction Plates) 11834483.