Shootin4fun- I went through the Sig Armorer's course last summer and IIRC, they said not to put on regular Hogue grips on the DAK. It would cause a binding on the trigger bar spring.
They told us that Hogue would be coming out with a DAK specific grip. I think it's out, but I'm not sure. Contact Hogue, they're customer friendly.
You can change the grips yourself if you're handy with mechanical type issues. Just be careful not to let the trigger bar spring come out of its holes. You don't have to worry about the de-cocking lever spring because DAKs don't have it. Also, get a screw driver that fits the grip panel screws, that way you won't bugger up the screw heads.
eta: spelling