6mm Airhard BB Gun

Because it sounds like an airsoft gun when firing lol

Parts that matter: VSSR barrel, .30 cal box mag, Makarov grip, Hecate II core, all to get it over the 100 damage threshold to make oneshot bodyshots possible without having to resort to screwdriver mag or .50bmg barrel with the insane recoil

How do I paint it to look more toylike to fit the BB gun theme I am going for, without making it blindingly bright? or any parts i can substitute so i don't have to use the VSSR barrel and can instead use the AS-Val barrel to make it feel even more like a BB gun?