Reproduction GX-607 and XM-177 Moderators: Do They Work?
This video from Forgotten Weapons, featuring expert Ian McCollum, delves into the functionality and historical context of reproduction XM-177 and GX-607 moderators by Liemohn Mfg. It examines their effectiveness in reducing sound and flash compared to original designs and dummy suppressors, referencing 1968 test data and the ATF's 1975 ruling on their classification as suppressors. The discussion highlights the historical need for such devices in Vietnam and their technical specifications, durability, and legal implications.








