My read is that One Punch and King Hit Cant be used together. It’s the bit that says “The fighter may choose to roll a single attack dice, irrespective of...any other bonuses” that makes me think that. And yes I can see how it could be read as only applying to the number of attack dice rolled rather than the additional effects applied to the single attack dice.
Sawn offs were always crap so I’m not worried about them becoming crapper, though I would argue that any rule that references a weapon, rather than an ammo type or weapon profile, would let you pick the ammo type or weapon profile you are using.
Also it looks like you are missing the new Backstop trait that the power knife has in the weapon reference chart on page 116. It’s clearly meant to be Backstab but that dastardly autocorrect has done it again.
Sawn offs were always crap so I’m not worried about them becoming crapper, though I would argue that any rule that references a weapon, rather than an ammo type or weapon profile, would let you pick the ammo type or weapon profile you are using.
Also it looks like you are missing the new Backstop trait that the power knife has in the weapon reference chart on page 116. It’s clearly meant to be Backstab but that dastardly autocorrect has done it again.