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Elite CNC Hop-Up Chamber for VFC M4
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Pickup available at Skirmshop Spain
Usually ready in 24 hoursELITE CNC HOP-UP UNIT for VFC
●Manufactured with ultra-high precision CNC machining
●Rotary type, hop-up dial with positive click adjustment
●Vertical aluminum hop arm for consistent hop performance
●Includes two buckings: Prometheus Original Purple and New 60 Degree Blue
The Elite Hop-Up Chamber is the ultimate precision CNC-machined hop-up unit designed for VFC-based AEG electric airsoft replicas. This chamber pushes every element of the hop-up system to the maximum, greatly enhancing the performance of your airsoft replica and its hop-up. Lightweight aluminum is used in the construction of this chamber, and it is fully machined in Japan. The lightweight yet durable aluminum is precisely manufactured, allowing for excellent consistency. In addition to its construction, the hop-up dial uses a ball bearing and spring to provide a positive "click" sound when making adjustments. This design not only allows for extremely precise adjustments, but also keeps the hop setting securely in place even under heavy use.
Our hop-up buckings are designed to fit perfectly with our EG inner barrels. By combining our barrel and bucking with this CNC hop-up chamber, exceptional air seal is guaranteed, resulting in impressive performance on the field. With the inclusion of two buckings, you can choose the original Prometheus Purple bucking for velocities under 350 FPS with 0.28g BBs, or the Prometheus 60-degree Blue bucking for velocities of 350+ FPS using 0.28g up to 0.32g BBs. Build your AEG to the highest standards with a Prometheus Elite CNC chamber, bucking, and barrel for optimal performance!
Compatibility:
●VFC Avalon Series AEGs
●VFC Samurai Edge Series AEGs
●SIG AIR Proforce MCX AEGs
●SIG AIR Proforce MPX AEGs
●BCM Air MCMR AEGs
●VFC H&K 416 Series AEGs
●VFC H&K 417 Series AEGs*
*417 Series AEGs are not a direct fit and may require some modification. Removing or trimming the hop-up retention clip will allow this chamber to fit properly. Please consult a trusted and reputable airsoft technician for assistance.
■ Brand: Prometheus
■ JAN: 4571443183613
■ Caution:
※ Not all AEG models are fully compatible without modification. Use the original stopper screw or barrel stabilizing springs to ensure a secure fit.
※ Be careful not to apply silicone spray or oil inside the inner barrel or on the hop-up bucking, as this may cause inconsistencies.
※ The use of LayLax Prometheus inner barrels and hop-up buckings is recommended for optimal performance due to the pre-set fit dimensions.
Pairs well with
In stock! Ships within 1-2 business days.
Complimentary shipping & returns

Elite CNC Hop-Up Chamber for VFC M4
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
Do I need an account to order?
No, but an account lets you save addresses, review orders, download invoices and manage wish‑lists.
When will my order ship?
Orders placed before 15:00 CET on business days ship the same day if the
items are in stock. A tracking e-mail follows automatically.
Can I change or cancel my order?
Yes, e-mail orders@skirmshop.nl or use the contact form before 15:00 CET on the shipping day
with your order number. After dispatch, changes aren’t possible.
Do you ship outside the EU?
Yes, the shipping rates and import taxes will be calculated at checkout.
What is the minimum age to buy an airsoft replica?
Please check your own governments regulations for the minimum required age.
Don't forget to send your ID.