VFC MP7 HPA Drop-In Kit (BYO PolarStar Engine Edition)
Finally, the MP7 we’ve all hoped for.
Due to overwhelming demand, we’re trialing a new option: you send in your PolarStar F2 or Jack engine, and we build your custom drop-in gearbox around it. This kit includes all the internal components of our standard drop-in build — minus the engine — and ships back fully assembled, tuned, and ready to run.
?️ What’s Included:
- Custom gearbox designed, printed, processed, and assembled in-house
- Choice of flat/straight or curved trigger
- 6.03mm upgraded inner barrel
- CNC aluminum anodized threaded outer barrel (14mm CCW or 12mm CW original spec)
- Upgraded bucking for proven consistency
- OEM hop-up unit (custom design in development)
- Printed barrel safety cap for shipping
- Spec sheet tuned for low-altitude, humid environments
? What You Provide:
- Your PolarStar engine (shipped to us for integration)
- If your engine doesn't come to us with the macro line you will need to purchase an Amped IGL
- Optional upgrades like Amped IGL or Aluminum Hop-Up Arm (available separately)
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⚠️ If your engine requires cleaning, rebuilding, or replacement parts (e.g., o-rings), additional charges will apply. We’ll contact you before proceeding.
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? Performance & Install Highlights:
- Zero alignment issues — gearbox locks engine in place
- Minimal body modification required
- Easy hop-up and bucking maintenance without voiding warranty
- Trigger install requires patience, but we’ve got video guides to walk you through it
- Superb air efficiency and flawless design trusted worldwide
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? Trial Program Notice
This customer-supplied engine option is in trial phase through mid-September. We’ll evaluate demand and performance before deciding on long-term availability.
