Yeah, I figured the only reason a race like the Rastal would bother coming up with something new specifically for space is if the new thing was *really* good there. Poking holes is really all you need to do to kill things in space, particularly if they need EVA suits, or have ventable gasses in their body (like people do).
That it sucks (or is at least horribly inefficient and impractical) elsewhere is supposed to be indicative of Rastal combat theory - you don't need to make this work particularly well outside of it's purpose because you already have simpler weapons that much better.
Course, I might have to come up with another design if anyone creates a race that doesn't mind being exposed to the void, but I'll cross that bridge later.
I'm also gonna add two pounds. 10 lbs is fairly heavy for a modern gun, but doing fake math tells me that this thing should be heavier with the big block of switching devices, fuses, and circuitry in the front end.