According to my father there were several different types of survival rifles or 'over-under' combo rifle/shotguns that USAF pilots had in their survival kits from the '50's till ???.
I've run across a few articles in mags over the years as they've become collectors items thou very hard to find...

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On Thu, 2/5/15, Dan Corrin <dcorrin@rogers.com> wrote:

 Subject: Re: [TML] Something for the ship's locker...
 To: "tml@simplelists.com" <tml@simplelists.com>
 Date: Thursday, February 5, 2015, 12:26 PM

 That links to wikipedia
 whose article also point to the soviet laser
 pistol
 Soviet
 laser pistol - Wikipedia, the free
 encyclopedia
       Soviet
 laser pistol - Wikipedia, the free
 encyclopediaThe
 Soviet laser pistol was a prototype energy weapon designed
 for cosmonauts. The weapon was magazine fed and used
 pyrotechnic flashbulb technology to project its beam.[2][3]
 Another example was a Laser revolver.[4] The weapons were
 meant to disable optical sensors on
 enemy...View
 on en.wikipedia.orgPreview
 by Yahoo  Dan
 Corrin - dcorrin@rogers.com

      On Thursday,
 February 5, 2015 10:56 AM, Jeffrey Schwartz
 <schwartz.jeffrey@gmail.com> wrote:

  http://science-beta.slashdot.org/story/15/02/04/1821207/tp-82-the-gun-cosmonauts-carried-on-space-missions
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