So I'm going to go through my opinion on all the names:
Gnat Bite: Has a nice ring to it, maybe this one
Spanish Fly: Sounds nasty and has a very nice ring, probably this one
Bullet Ant: sounds like something fast, but not for the current ant
Assasin Bug: hmm, not really, not as nice as the others
Gnat Attack: Love the sound of this, sounds like something striking, like an axe
Gnat-Thing Special: Sounds like a one trick pony or a final gambit or something like that, sounds cool
G.N.A.T: For a heavier weight class tbh
Bloodsucker: Yup, for a future crusher, and it sounds awesome
Tango Gnat: Just sounds like you put 2 words together, not really
All pun names: doesn't sound like something for the battlefield tbph but one day maybe
Also, I was bored, so I drew up some designs cause I was bored:
And could you answer these questions:
1. Which one looks the best
2. Which one would do the best
3. Which one will be the cheapest in your opinion
and also feel free to drop in any more name suggestions
EDIT: Also thank you plazmic inferno, R1885, Natef and Badnik for your help on the receiver :)