@dmccombe7 As mentioned elsewhere, my 450 B is 4.505 kilos, my DMZ 6000 B is 4.690 kilos and my The Duke Deluxe Trans Red is 3.665 kilos. Finally not that heavy for such infinite sustain basses.
So a good guess for a DMZ 4000 would be around 4.250 kilos (no Bad*ss, only one pickup, less pots, no backplate, that would be 400 to 500 grams less than say my DMZ 6000 B).