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Old 01-24-2021, 05:02 PM
Doco Overboard Doco Overboard is offline
 
Join Date: Nov 2016
Location: Delaware/Delmarva Peninsula
Posts: 178
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I have a M17 with a US in a shield just like that.
Have no idea what it means. I always thought it was placed there by an aftermarket seller when rifles were mail order or something like that.
Maybe someone could say for sure or provide more info.
It's located in the same area on the stock underside.
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