No one knew of its existence until the early 90s, when a Russian company put it into production for the public, so it's not surprising that James Bond never had to stare down its quadruple threat. The most unique aspect of the B-VI-307 — besides having four smooth-bore barrels — is that it doesn't fire traditional bullets. It's actually designed to be used underwater, where regular ammunition doesn't have much accuracy or range. So, instead, it fires 11.4cm steel darts that can accurately travel 15 to 20m.
Image by Dan Shea/Small Arms Defense Journal