This mount fits the Nitro Z18 / Z19 / Z20 / Z21 model. If your bow looks like this, then this mount will fit.
You will have to purchase a riser in order to fit a HDS-16 Gen2/3, Carbon and HDS-16 Live. Use this link to purchase a riser.
NOTE: This mount is made to mount of top of your factory Bow Plate, The screw holes will NOT match up to the holes in your Factory Plate. The reason is that Nitro does not have a set place for where they drill Holes to mount the plate at the factory. They just choose where ever they want to put their holes