You guys are all saying such and such will fit but they are all 30 mm tubes. The Z3 is a 1" scope. This is generally speaking (no field craft experience) but it is common to be able to use lows with a 30mm tube/40-44mm objective where a 1" tube/40-44mm objective will be pushing the envelope.
rovert you are correct I didn’t stop to think about that before but since the center line of the tube is around 2.3mm higher 30mm scopes with a 40mm objective should ride higher in low's than a 40mm on a 1" tube.