I don't know the BFG9000 (or many video games)
I do know that the Gom Jabbar (high handed enemy) was a poisoned needle used by the Bene Gesserit in Frank Herbert's "Dune", and I've known it since I read the book back in the 70s.
there was no peeking involved.
What will the Space Force individual weapons be? In the far future, who can say? In the near future, until we actually get people living in space, the weapons will be appropriate standard issue from the "parent" service (US Air Force).
Once we get living in space ships and habitats, the smart move would be something like a taser, (wireless charged dart??) that could incapacitate a human while posing little or no risk of puncturing the habitat.
while there might be an actual gun or two at each facility or onboard each ship, (and under lock & key control of the facility Admin) you won't see crew wearing pistols or armed to "repel boarders" with conventional firearms. Aside from the risk of letting the air out of your own ship, and the drawback of recoil in microgravity, its simply a cost/benefit analysis. Literally (at this time and for the forseeable future) the cost of lifting the mass of a conventional firearm out of Earth's gravity well far "outweighs" the benefits.
Now, when we get to exploring other planets, there will be SOME firearms involved, but very few, until it is known there is a threat, beyond the one we bring with us. I would fully expect that there will be a gun (or two) that go to Mars when people do, "just in case". But there won't be more than that, unless/until there is some known threat.
If we carry our Earthly political squabbles beyond Earth, then its possible each camp will arm as there is a potential enemy. But there won't be Starship Troopers, unless there are "bugs" to fight.