VFC HK416 M4 AR15 GBB Reenforced Outer Barrel Extension Chamber VG20ADC040
VFC HK416 M4 AR15 GBB Reenforced Outer Barrel Extension Chamber VG20ADC040
Reinforced Upgrade for VFC VG20ADC040 (HK416A5 / AR-15 GBB)
Precision CNC-machined replacement for the fragile OEM plastic part. Designed to lock the barrel solidly, improve chamber alignment, and survive repeated disassembly.
Choose Your Material & Finish
|
Option |
Alloy |
Surface Treatment |
Finish |
Weight |
|---|---|---|---|---|
|
Aluminum |
7075-T6 |
Type III hardcoat (~400–550 HV) |
Champagne Gold |
15 g |
|
Stainless Steel |
304 |
Sandblasted (~190–280 HV) |
Matte Silver |
43 g |
Key Features
-
Fixes Barrel Wobble – Reinforced body and integrated barrel nut greatly reduce or eliminate barrel play on VFC HK416A5 GBB platforms.
-
Drop-In Compatibility – Slightly enlarged chamber bore (CB) accepts OEM and most aftermarket hop-up units—e.g., GHK chamber—without fitting or modification. No promise to accept all aftermarket parts.
-
Self-Centering Design – Internal CB taper auto-centers the inner barrel; the integrated barrel nut maintains alignment under load.
-
CNC Precision – Tight, repeatable tolerances for consistent assembly and accuracy.
Compatibility
-
Fits all VFC AR-15 / M4 / HK416 GBB models (including HK416A5).
-
Direct upgrade/replacement for VFC part VG20ADC040.
Notes
-
Hardcoat aluminum offers the best weight-to-wear performance; stainless provides maximum robustness at higher mass.
-
As with any coated/treated part, avoid metal-on-metal scraping during installation; light lubricant on threads and bearing faces is recommended.
📢 Our Support Principle
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.
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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
Fits perfectly, and the nozzle whacking into this when it closes up is just amazing. Worth every single penny! If you feel let down by the original plastic part making a pathetic klunk sound, this replaces it with a satisfying metal on metal klang. Just brilliant brilliant brilliant. Every GBBR should have this IMHO. (Went with the stailness steel version for wear resistance)
The aluminium chamber compared with the clutch percision hop up lever give a significant increase in range an percision to my VFC HK 416A5 Gen 3 GBB. The aluminium chamber is machined a little bit bigger in the inner diamter as the standard plasitc chamber, which is mentioned in the discription. But when you tighten the barrelnut with a 19-51mm hook wrench, theres no play and barrel wobbling. I am using a meaple leaf autobot 70° bucking with minimal 0.32g up to 0.40g bb´s and the standard VFC Hop up Chamber+ Clutch percison Hop up lever
Fits like a glove