Assuming that “new” doesn’t mean anything here, you’re looking at the Russian AK-630 or a variant thereof. wikipedia.org describes it as a “fully automatic naval close-in weapon system based on a six-barreled 30 mm rotary cannon. In 630, “6” means 6 barrels and “30” means 30mm. The system’s primary purpose is defense against anti-ship missiles and other precision guided weapons. It can also . . .
be employed against fixed or rotary wing aircraft, ships and other small craft, coastal targets, and floating mines. Despite the title of this video, the AK-630 “only” shoots 5k rounds per minute. As opposed to America’s Phalanx CIWS, which fires 10k rounds per minute. Ours looks prettier, too.