FSC: 1220 - Fire Control Computing Sights and Devices
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MIL-PRF-71185 - MIL-PRF-71185, PERFORMANCE SPECIFICATION: DYNAMIC REFERENCE UNIT HYBRID (DRUH) (31-JUL-1999)
MIL-PRF-71185 A - MIL-PRF-71185A, PERFORMANCE SPECIFICATION: DYNAMIC REFERENCE UNIT-HYBRID-REPLACEMENT (DRU-H-R) (27-AUG-2013)
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