[@tipssyCalibrator] Might I suggest something akin to Ki blasts instead of literal guns? They get their projectile pew-pews, but they don't have the firmly established speed and lethality that bullets do. Because, how fast even is Ki, right? It'd still be fast, do a bunch of ouchie damage, but it's not an insta-win for most fights. Hell, you could even let them have a gun construct for the aesthetic if they want to help them "channel their ki into concentrated blasts" or whatever justification. But, it's ultimately your call.