I wonder if the
anti-material rifle is a miss-translation of anti-matter?
Anti-material would be in UK English more like "anti-cloth", hence a gun that makes your clothes fall off. Nice for pubescent males to use on unsuspecting females, but not a lot of use on a mob with no clothing to start with.
I can see it in chat "Naws Tel Telmal undressed Sarah (master Colourer) using a Manuari Stoikow Anti-material rifle, prototype (L), and caused her great embarrassment."