Relod'n you got to be kidding me,,,, 8 minutes?
204 Heckler & Koch P11
https://en.wikipedia.org/wiki/Heckler_&_Koch_P11
And a video of one being fired
https://www.bing.com/videos/search?...A7A52BDAC0DBA15527BEA7A52BDAC0DBA&FORM=VRDGAR
The HK P11 is a Heckler & Koch pistol designed as an underwater firearm that was developed in 1976. It has five barrels and each fires a 7.62 X 36mm dart electrically. Loading is by means of a five-round case. The design resembles that of a pepper-box firearm.
Design[edit]
Since ordinary-shaped rounds are inaccurate and have a very short range when used underwater, this pistol fires steel darts.[1] It has five barrels, each of which is loaded with a cartridge, giving the gun a pepper-box appearance, and it is electrically ignited from a battery pack in the pistol grip.[2]
After firing all five cartridges, the barrel unit must be sent back to its manufacturer for reloading.[3] It is very similar to its predecessor, the Mk 1 Underwater Defense Gun. In the past, Heckler & Koch has denied knowledge of its existence.[4]
This firearm is somewhat bulkier than its Soviet counterpart, the SPP-1 Underwater Pistol, but it has five barrels, as opposed to the Soviet firearm which has four. However, the SPP-1 does not need to be sent back to the manufacturer to be reloaded.