[Pre-Order] VFC MCX APFG Rattler GBB Enhanced Chamber Base with 4UAD Support
[Pre-Order] VFC MCX APFG Rattler GBB Enhanced Chamber Base with 4UAD Support
In production, launch end December 2025
This upgraded chamber base is CNC–machined from durable T6 aluminum with hard anodizing & black nitrite steel and engineered for a precise, tight fit within the VFC MCX APFG GBB platform. Its reinforced structure and optimized thread geometry deliver a major durability boost—especially when pairing the system with heavier steel outer barrels.

Key Highlights
-
Direct compatibility with the 4UANTUM Magnus Pro AR TDC Hop-Up Chamber (VFC/GHK AR/M4 GBB)
The Magnus Pro chamber installs directly into this chamber base with no modification required. Adjust your hop-up exactly as before via the fake ejection port—clean, intuitive, and functional. -
Invisible internal upgrade for maximum realism
Once installed, the chamber base is completely hidden. You can remove the OEM external hop-up adjustment rod entirely, giving your MCX build a far more authentic appearance. -
Ready for steel outer barrels (separately available)
The redesigned front section features significantly strengthened material (steel) to support heavy steel outer barrels with no flex or risk of stripping.
Compatibility Table
| Platform | Compatibility | Notes |
|---|---|---|
|
MCX GBB Series/Rattler /Legacy/SPEAR LT |
✔ Compatible | Designed specifically for the MCX APFG system; direct drop-in fit. |
| APFG MPX GBB | ✘ Not Compatible | Different chamber specifications; geometry does not match. |
| APFG M7 GBB | ✘ Not Compatible | Uses a revised internal structure; compatibility not supported. |
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We are the Gap Filler
Where mainstream production stops, Clutch Precision begins — engineering the missing pieces for true enthusiasts.
FAQs
Quality Standard
In the airsoft world, absolute perfection is neither possible nor practical.
While we constantly work on optimizing the processes, it's still very difficult to achieve perfect results with limited manpower.
Minor tolerances, marks, or finish variations are natural in precision mechanics and never compromise performance or quality.
Support
We take every piece of feedback seriously – but only if it actually reaches us.
Customers who contact us directly will always receive full support: replacement, additional shipment, or refund, handled promptly and without complications.
What we cannot do is monitor complaints posted in Discord servers, forums, or YouTube comments. In those places we see no order number, no details, and therefore we cannot provide a real solution.
Shipping
We aim to ensure fast and reliable delivery to all our customers, whether you’re in the EU or elsewhere in the world.
Shipping is either from our Latvian or Asian warehouse, according to the inventory availability
We will always pick the best lane for your country/area. The average delivery time to EU and UK is 5-10 days, to USA and Canada is 10-14 days, South Korea and Japan 5-7 days
Return & Cancellation
- Orders not yet dispatched can be canceled free of charge.
- EU customers are eligible to initiate return process within 14 days upon the delivery of the parcel
- Returned items must be in resealable condition, otherwise we have the right to refuse the return or reduce the refund amount
- If the return is not caused by our own mistakes, customers are always to bear the return cost