You can't take the sky from me
A kitfighter is a light aircraft built from a standard “kit” that’s had weapons bolted on.
Ultralight aircraft kits are extremely common, and have gotten to the point where just about anyone with any aviation knowledge whatsoever can buy one, have it shipped in a box, assemble it in an afternoon or weekend, and start flying around. Their simplicity makes them very easy to repair or replace, and their relative low cost makes them a popular choice for regional air forces or law enforcement… and also for mercenaries and bandits.
A particularly nice (VTOL capable) kitfighter (before guns added):
A smaller type: