u/DeadManDDProds

Prepping Guilt of the Grave World for my group, and I'm a little confused about how the Scrap Rats work with their grenades. Grenades don't use an attack roll, instead they use the Class DC of the PC who throws them. But monsters don't have a Class DC, and in the Scrap Rat statblock they just list an attack modifier with no DC. Would I just add 10 to the attack modifier and use that as the DC? Because DC 17 seems a little high for the first thing the PCs fight.