Quick answer
Choose the Motorbunny Buck if you want a hybrid saddle vibrator with thrusting and built-in Vac-U-Lock compatibility. Choose the Motorbunny Jack if you prefer a handheld, adjustable thruster that works with nearly any attachment.
Form factor and control style
The Motorbunny Buck is a full saddle-style machine that combines vibration and thrusting in one unit. You sit on it hands-free, which makes it ideal for immersive solo or partnered scenes. The Motorbunny Jack, by contrast, is a handheld device that you guide manually. Its ergonomic shape and wireless app control let you adjust thrust depth and speed on the fly without bending over a console.
Attachment compatibility and versatility
The Buck comes with a Vac-U-Lock adapter and three included attachments, including two Doc Johnson favorites. That means you can swap in any standard Vac-U-Lock dong or dildo without extra adapters. The Jack uses a universal clamping mechanism that accommodates virtually any penetrative toy, but it does not ship with a Vac-U-Lock adapter. If you already own a collection of non-Vac-U-Lock toys, the Jack offers more flexibility out of the box.
Trade-offs at a glance
- Mounting style: Buck is a hands-free saddle; Jack is a handheld unit. If you want to stay seated and let the machine work, choose Buck. If you want to guide the action yourself, choose Jack.
- Attachment system: Buck includes a Vac-U-Lock adapter and three attachments. Jack uses a universal clamp with no included adapter. Buck is ready for Vac-U-Lock toys immediately. Jack works with a wider range of non-proprietary toys.
- Price difference: Buck is $1,249.89 (was $2,049.00). Jack is $699.30 (was $999.00). Jack costs about $550 less, making it the more budget-friendly option if you don’t need the saddle form factor.
Key product facts
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Motorbunny Buck - Thrusting Sex Machine (Doc Johnson Vac-u-lock Edition): World’s first hybrid saddle vibrator and thrusting sex machine; includes Vac-U-Lock adapter and 3 attachments. You get vibration and thrust in one unit with immediate access to the large Doc Johnson Vac-U-Lock toy ecosystem.
Motorbunny Buck - Thrusting Sex Machine (Doc Johnson Vac-u-lock Edition)
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Motorbunny Jack - Handheld Thrusting Sex Machine: Handheld, adjustable thruster with wireless Fluffer app control; accommodates virtually any penetrative attachment. You control angle and depth manually while still having app-based precision for speed and patterns.
Motorbunny Jack - Handheld Thrusting Sex Machine
Which one fits you?
Best for
- Users who want vibration and thrust in a single hands-free saddle
- People who already own or plan to buy Vac-U-Lock attachments
Not ideal for
- Anyone who prefers a handheld, manually guided thruster
- Budget-conscious buyers who don't need the saddle or Vac-U-Lock system
