The Buck package consists of a realtime model made up of approximately 2706 polygons and a high res sculpted model made up of 100s of thousands of polygons.
A 4k Normal map is baked from the sculpt data, as such can be applied to the realtime model without compromising much detail for performance.
The realtime model also has an FK (Foreward Kinematics) armature and an active modifier stack. Hair and fur are included within the scene.
If you have any further questions, don't hesitate to ask. It would be my pleasure to assist.