Why you should not trust the media, example 10,592-A. They get even simple, easily checked basic facts totally screwed up.
A news report said Dozens of small boats and a large cutter are cruising the Potomac River and the Anacostia River, with 240-caliber fully automatic rifles mounted to their bows, and heavily armed Coast Guardsmen aboard.
A… what? A “240-caliber fully automatic rifle…” duh fq?
The only place I’ve seen “caliber” used on something greater than 1” bore was the “large gun meaning”, that is the multiple of the bore diameter to get the barrel length (like a 5”/L38, meaning barrel was 38 x 5” = 190” long). I could be wrong, but… yeah, it’s screwed up no matter how you look at it.
I don’t know of any .24 cal full auto production guns.
The navy doesn’t have any ship guns that are 240 mm (5” = 127mm, 240mm = 9.45”)
But they DO have the M240. “The M240, officially Machine Gun, 7.62mm, M240, is the US military designation for the FN MAG, a family of belt-fed, gas-operated medium machine guns firing the 7.62×51mm NATO cartridge….”
Rule # 1 of media literacy – the stories are mostly written by you and idealistic morons with an agenda and little knowledge of the subject.