I think stun is useless on bow 1 but usefull on bow 5
Anyway bow 7 still better
if there were i would imagine it's either a mongolian-chinese composite bow or a double shot 20 clip repeating crossbow (both are real). they prolly wouldn't add it though bc first one would nerf bow 1 n 2 bc it's a bow with bow 1 mobility n speed and bow 2 power/strength. other one obv is just better version of bow 5, making that one slow is okay but for the composite bow would be nonsense as it's made for mobility.