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- Slightly narrow entrance for better sealing to achieve more consistent power output.
- Special pressure point geometry greatly improves hop up performance and more predictable trajectory.

- C-Clip to Enhance Lip Stiffness for Further Sealing
- Suitable for Marui / WE / KJ GBB Pistols, WE GBBRs and VSR-10 compatible Air Cocking Rifles

NOTE: Due to special pressure point geometry, this product is optimized for use with inner 
barrels with open type hop up slot.
( i.e. Marui original pistol inner barrel and most compatible inner barrels )

Autobots Hopup bucking is  for longer distance and the DECEPTICONS hopup buicking is for short distance and higher accuracy

Recommended hardness/FPS combinations:

50 degree: Up to 360 FPS

60 degree: 295-390 FPS

70 degree: 360-460 FPS

75 degree: 425-490 FPS

80 degree: 490 FPS up