H&K P11 Underwater pistol

I think it is cool as apparently it does actually work, for it to be used by the SAS and other special forces, it looks really unbalanced, and having to sent it off to the factory to be reloaded is quite interesting
 
i've heard of it before, but i haven't heard much about it's effectiveness. neat design. there's supposed to be another HK gun that shoots underwater, was that a modified MP5?
 
Kinection said:
The russians have something similar in pistol and rifle form.

They are ok under water (better than normal guns at least), still limited. But absolutely terrible on land. You're not supposed to use it on land unless it's an emergency too since it's bad for the gun.

http://world.guns.ru/handguns/hg140-e.htm
http://world.guns.ru/assault/as69-e.htm

The latest Russian amphibious gun is the ASM-DT which fires two types of ammunition. The standard 5.45x39 M74 cartridge in air out of an AK-74 magazine and a special (new) 5.45x39 under water cartridge which fires an arrow out of special magazine (which is much wider).
The two different magazines are attached to the gun by sliding the magazine catch on a rail on the lower side of the gun which is likely also adjusting the recoil system from "air" to "land" and the other way round.
Unfortunately the Russians did not publish very much on this gun so far.
Only a few blurry images are around in the net and 1 or 2 images of prototypes in some printed matters.

The German P-11 fires 2 different types of ammunition. One for "land" use and one for "water" use.
The land use ammo is a separate system with pushing rod inside which keeps the propellant gas inside the cartridge, a so called gas caption system. This ammo is silent and does not require a silencer.
For water use the ammo has a dart shaped projectile which has an optimized shape for under water "ballistics" if we can call it like that.
That the gun has to be send to the factory for reloading is not really correct. The whole barrel section (plastic) with it's 5 rounds is removable and once it is fired it is disposed of (in action). Due to the fact that the barrel block contains also the sight which contains radioactive elements (not unusual in the military as many guys know here) it has to be delivered back after target practice for environmental reasons. Once the blocks go back to the manufacturer they are checked and wether reloaded or scrapped after the sights are removed. For reloading the spent ammo sections are screwed off and new ones are screwed in because the "cartridges" if we can call them like that have a thread on the outside.
 
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