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ProWin CNC Hopup Chamber for M4/M16 Series Airsoft AEG Rifles

ID: 40058 (HU-PW-M4)
4.1 stars, based on 29 reviews
ProWin CNC Hopup Chamber for M4/M16 Series Airsoft AEG Rifles
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This item is currently Out of Stock Usually restocked within 1-3 weeks.
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MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Compatibility: For Matrix, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Rifles
Material: CNC Aluminum

Manufacturer: ProWin

  • High performance M4 hopup unit.
  • CNC out of aircraft grade aluminum.
  • Superb air seal.
  • Superb durability.
  • Anodized surface treatment.
  • California residents click here for Proposition 65 warning

    29 Customer Reviews

    (Write a review)

    by Tyler H. on 10/10/2017
    "While this hopup chamber looks and feels amazing, I will never buy it again. For something that should have been a relatively easy upgrade, this caused so much more hassle that it was worth and still isn't even working as it should. Saying I have to modify my gun would be an understatement. I had to take apart the whole entire gun 3 times for it to line up correctly. Even with it modified, I would still have to take the motor out everytime I wanted to pull the barrel out. And to top it all off, when I finally got it all finished and closed up, the arm for the hopup nub fell off meaning I will have to redo my whole process again.

    -Looks cool
    -Feels very sturdy

    - Doesn't fit my Echo 1 Mrf-c M4 without heavy modification and cutting
    - The nub arm does not have a lock, so it will fall out
    by Bryce P. on 04/07/2017
    "Do I recommend this? Absolutely, but there are pros and cons as with anything

    -Good quality construction, sturdy
    -easy to assemble
    -Works very well when paired with a good bucking
    -looks nice
    -Hop Up is easily adjusted while installed

    -Does not seal well to the barrel, now this can be fixed with the O-Ring Mod and/or teflon tape. I used both, now it is flawless.
    -No instructions, may be a deal breaker for some people

    Overall I highly recommend it, especially for $30 over an OEM Plastic replacement in the event your hop up is broken!
    by David B. on 03/19/2017
    "I bought this along with the purple promy to flat hop my CM16 Raider. When flat hopping this I would highly recommend using an eraser for the nub rather than wasting $20 on a firefly. Best hop up on the market for this price.

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    This item is currently Out of Stock. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.