This video provides an expert-level examination of reproduction XM-177 and GX-607 moderators by Liemohn Manufacturing. Ian McCollum details their historical purpose in Vietnam for reducing the excessive noise of short carbines, presents live-fire sound test data from 1968, and discusses the internal design and durability. The legal implications, including the 1975 ATF ruling classifying them as suppressors, are thoroughly covered, along with current pricing and NFA requirements.
This expert-level comparison by Ian McCollum of Forgotten Weapons evaluates the sound differences between a real XM-177 moderator and a fake flash hider, using a standard M16 as a baseline. The testing highlights the extreme loudness of the fake flash hider and references historical military data to underscore the effectiveness of the original XM-177 moderator in reducing both flash and sound.
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