100M carbon steel outer barrel for VFC HK416A5 & 4UAD Magnus

This outer barrel allows you to install one of the best AR GBBR aftermarket hop up chamber on the market, the 4UAD Magnus PRO, into your VFC V2/V3 HK416A5.

Why should you replace the original barrel & hop-up with this?

• A better system, especially if your original guided hop up doesn't hold the hop up tension and you need to redial mid game.
• One-piece design means no more wobble between the base and the barrel which the original split design suffers from after some time of use due to recoil.

Made of strong medium-carbon steel weighing ~279g, which gives you more realistic feel. 

Bead blasted and QPQ treated for great surface hardness and smooth black finish.

Installation guide for the VFC HK416 outer barrel

V3 or the 2026 EVO version?

1) I don't have a HK416 yet - I highly recommend simply buying the EVO version. This already has a one-piece outer steel barrel and only upgrade in terms of hop up you may need is the ZeroArm for better consistency. If it shoots great out of the box - 0 investments.

2) I have a V3 / I want quad rail handguard - then this investment makes sense. It will be probably much cheaper than selling and buying a new gun