Also I just want to mention there are also no guns in space (yet).
nope
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loginThe TP-82 pistol (Russian: ТП-82) was a triple-barreled Soviet firearm that was carried by cosmonauts on space missions.
It was intended as a survival aid to be used after landings and before recovery in the Siberian wilderness. The upper two smoothbore barrels used 12.5×70 mm ammunition (40 gauge), and the lower rifled barrel used 5.45×39mm ammunition. The pistol could be used for hunting, to defend against predators and for visible and audible distress signals. The detachable buttstock was also a machete that came with a canvas sheath.
That could not be used in space though, since it was a regular gun.
Due to reduced/no gravity, black powder weapons do not function properly. Traditional firearms would rip Cold War era ships up real bad and then everyone onboard would die. So it's not really a space gun. But this next one is:
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Soviet laser pistol, designed in 1984. It did not use a battery to produce a laser like modern day laser pointers. Instead, it had a magazine with 8 flashbulbs (yes, like the flashbulb on a camera) as ammunition. The light from the flashbulb was focused inside the gun to create a laser beam. Looking these up I just found out that one of the Soviet space stations had a gun turret mounted to it as well.
The Salyut 3, although called a "civilian" station, was equipped with a "self-defence" gun which had been designed for use aboard the station, and whose design is attributed to Nudelman.[1] Some accounts claim the station was equipped with a Nudelman-Rikhter "Vulkan" gun, which was a variant of the 23 mm Nudelmann aircraft cannon, or possibly a Nudelmann NR-30 30 mm gun.[12] Later Russian sources indicate that the gun was the virtually unknown (in the West) Rikhter R-23.[13] These claims have reportedly been verified by Pavel Popovich, who had visited the station in orbit, as commander of Soyuz 14.[12] Due to potential shaking of the station, in-orbit tests of the weapon with cosmonauts in the station were ruled out.[1] The gun was fixed to the station in such a way that the only way to aim would have been to change the orientation of the entire station.[1][12] Following the last manned mission to the station, the gun was commanded by the ground to be fired; some sources say it was fired to depletion,[12] while other sources say three test firings took place during the Salyut 3 mission.[1]
