Yep, dead giveaway that it is a spoof. I've owned a Bearcat since ca 1958. IIRC, it is the smallest (and, IMHO, the prettiest) .22 revolver Ruger ever made. And the "custom fluted" comment is a hint that the poster knows his guns and is pulling your leg: the Bearcat had an unfluted cylinder with etched scenes of a bear and a cat ( cougar).
A .22LR penetrating body armor and making a big hole -- I definitely don't think so...
Neat joke, though...