I've had dozens if not upwards of 100 airsoft guns over the last two decades of collecting and playing. Not going to lie, full RW parts in my KCO2 is probably the highest performing gun I've ever laid hands on. More so than TM gspecs, SRS, tac41, p*s, mtws, the list goes on. With .48g bbs, the kco2 full sends day in and day out.
Genesis kit, pink flamingo, EDGI barrel, barrel stabilizer, Teflon silent buffer, fang trigger set, piston, DTSS suppressor, tanuki v3 adapter, rw bolt and charging handle, bolt catch, barrel clamp, .etc.