[Snake]

'Daggun' (Mutated 1* Handgun) cannot use any of Archer's ranged skills, such as Cripple Leg. (Still, the skill can be selected. As well as bullets from Magic Gunner, still, they don't apply to the weapon or work in general.)
I don't know if it's intentional or not though. Is it supposed to be just a ranged, multi-shot 'dagger'?

[Autumn]

A dagger won't benefit from gun skills, or arcane gun, nor shell effects, thats what happens you mutate stuff.