Thanks for the input guys.

Eagle27, some measurements would be very nice.

Dorleac, your work is a great inpiration. I was thinking the original ZKK 602-barrel would be a on the light side for a 404, but now I will have to give that some consideration.

A quick mobile pic of the starting point. The barrel is cut down to 20", and the recoil lug and rear sight is removed from the barrel. As is, the weight is just a thad over 9.5Ib. I don't think I would want to have the finished rifle at more than 10Ib.

ZKK 602