If your Bow looks like this, then this mount will fit
Single and Dual Stack Bow mounts: Gimbal Savers are suggested to be used with these mounts due to the angle of the Plates.
Gimbal Savers can be purchased here: Gimbal Saver
You will have to purchase a riser in order to fit on a RANGER 619/620 if you plan to mount a HDS-12 Gen2/3, Carbon/HDS-12 Live, HDS-16 Gen2/3, Carbon/HDS-16 Live, Garmin 7612 and Garmin 7616.
The Ranger 621 will only need the riser for the HDS-16 Gen2/3, Carbon/HDS-16 Live.
Use this link to purchase a riser.