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Rotary High Performanced HOP-UP For M4/M16 [CYMA]

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CYMA  FBP4140 | Available
Our price*: $6.49

The last price before promotion: $9.27

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  • Technical data

    Manufacturer: CYMA
    Code: FBP4140
    EAN 5901698498795
    Weight 30 g
    Replica Model AR15 / M4 / M16 Airsoft Gun
    Material ZnAl
    Quantity in package 1 pcs

  • Reviews

    • - 11.03.2026 wrote:
      Dropped it into a arcturus aeg never had any issues so far with it it fits very nicely great build quality i really like these kind of rotary hop up chambers makes the hop changing proces just so much easier
      Opinion rating: 0
    • - 19.01.2026 wrote:
      Fits perfectly in my economic Cyma sport 513. It comes with a PDI-style bucking, which was a surprise. Great accuracy. Saves time on upgrades, which are difficult to install on Cymas (it manufactures with its own specific tolerances, the nozzle for example is the longest on the market).
      Opinion rating: 0
    • - 04.08.2025 wrote:
      Plug and play.
      Easy to install !
      Happy costumer geint to buy more Here!
      Shipment is fast and as description is showing.
      UPS services are not always the best but That is forgotten fast when the parts have arrived
      Opinion rating: 0
    • - 11.03.2025 wrote:
      Very solid piece. A little bit hard to rotate but other then that it works as it should. Fits for almost all kind of m4/Ar15 branch. I installed it on my specna arms edge m4 since the plastic hop up they have broke.
      Opinion rating: 0
    • - 03.01.2025 wrote:
      It's a full metal Hop Up unit. It comes with 2 Orings. The best part is that it comes with its own bucking so you don't have to buy a separate one although I'm not sure how many degrees it is. The only "negative" I have to say about this is that it requires assembly but you can easily do it by watching a YouTube video or even the pictures on the product page. A friend of mine used this hop up to upgrade his CYMA replica. You can find the video here if you want to watch its performance or even see how to assemble it yourself;
      https://youtu.be/zNRsoP0MtJ4?si=xbMQJGfrX7U9gz_-
      Opinion rating: 0
    • - 04.10.2024 wrote:
      Fits perfectly in an older valkan alloy mk3 where the old hop up was broken. Later I found only the rubber was broken but hey new to working on my own rifle :). All in all very good product thoiugh the wheel can be very tight.
      Opinion rating: 0
    • - 27.01.2024 wrote:
      It is a great upgrade for airsoft replicas with regular gear type hop up unit. It even comes with a bucking which seals great with the unit. The barrel spacer is also far more superior than standard brass rings. It is easy to install and fits perfectly in stock Cyma outer barrels.
      Opinion rating: 0
    • - 02.09.2023 wrote:
      I am completely satisfied with it.

      Opinion rating: 0
    • - 16.05.2023 wrote:
      This is a really good hopup housing. It worked much better than the more expensive SLONG one. I have only tried it out in the AGM STG44 I have, it fit like a glove! Not too thick! As some rotary units can be.
      Positive clicks on the adjustment, maple leaf omega nub fit perfectly without issues. Loving it so far! Doesnt seem like a bad cast, but it isnt CNC. For the price you cant beat it.
      Opinion rating: 0
    • - 08.05.2023 wrote:
      This is the best hop-up you can buy for M4 if you ask me. Its quality is made and the arm for the nub is perfect for Maple Leaf Omega nub, which I think is very important since most of us use this nub.
      Opinion rating: 0
    • - 13.02.2023 wrote:
      Bought this to replace the stock hop-up unit of a G&G CM16 Raider Gen 1, as it wasn't working right with an aftermarket nozzle. This hop-up unit fits perfectly, is kept in place by the spring and is also a lot easier to put together, all for a surprisingly low price.
      Opinion rating: 2
    • - 23.04.2022 wrote:
      Really tight fit in E&C body so much so that i didnt even have to use the spring. Adjustment is easy and solid, paired with a aimtop bucking and flanub it shoots laser beams on heavier ammo, very satisfied, will only be buying these chmabers for later projects, great job Cyma, truly best Brand in AS
      Opinion rating: 1
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  • Ask for item

    The administrator of your personal data is \ KRAKMAN P.Kiepura, K.Michalik Sp. k. with its registered office in Kraków, ul. Półłanki 18, 30-740 Kraków, NIP: 6793082897, REGON: 122593008. Personal data will be processed only in order to establish contact with you and legally justified purposes of the controller. Providing your personal data by is voluntary but also necessary to contact you. Detailed information about the processing of your personal data can be found in ourPrivacy policy on the rules of processing personal data. Fields marked * are required

Most popular parts for tuning and repairing ASG replicas — Check out the other products in the series

Rotary adjusting ring provides smooth and precise adjustment.
The hop-up chamber dedicated to the M4 type replicas, fits perfectly with Cyma replicas.
It was made of light alloys, it ensures durability and tightness.


Safety & Usage Guidelines

This product meets all EU regulatory requirements. Professional assembly required. Order assembly service from Taiwangun or refer to materials below. Warning: contains small parts, not suitable for children under 14.
SKU: FBP4140 · EAN: 5901698498795 · Rotary High Performanced HOP-UP For M4/M16 [CYMA] ·
Report safety issue · Responsible person & manufacturer
Responsible person & manufacturer
Responsible person for product placed on the EU market:
KRAKMAN P. Kiepura, K. Michalik sp.k. · Pollanki 18, 30-740 Krakow, Poland · [email protected]
Manufacturer:

REPLICAS AVAILABLE ON TAIWANGUN.COM MIGHT BE PURCHASED ONLY BY ADULT USERS. PRODUCTS FOR ASG AND MILSIM USE ONLY.

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