Or, as the Brits called it in 1941, a "sound moderator."
Winston's plan was to issue the Winchester 74s to the able-bodied in coastal counties. They would lay low as the German invasion wave swept over them, then emerge in the Nazi rear -- take the image any way you want -- to wreck general havoc. Some 74s were equipped with "No.42 straight scopes" and the government freely admitted they should be employed by citizens for assassinating Wehrmacht officers and "important administrative officials."
More on this noble use of one of the excellent little .22 semi-autos here. Dandy site, by the way, for research on several civilian rifles we sent to Albion when she needed them.
Anyway, the pretty one that got loopholed* in Dakota Territory today joins a twin brother in the rack, and the guy who bought it says he's now damned well ready to defend liberty against any heathen hordes of left-wing gophers.
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*Decent citizens rightfully despise gratuitous verbing, but the the blooming idiots on the left have made "loopholed" and its derivatives both useful and graceful.