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Home » Airsoft Accessories, Attachments & Parts » Gas Gun Parts » Gas Gun Hop-Up

4UAD SmartAirsoft 4uantum Magnus Pro Precision TDC Hop-Up Chamber for GHK/VFC M4 Gas Blowback Airsoft Guns

ID: 121104 (Hop-4UAD-TDC-002)
TDC-002
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4UAD SmartAirsoft

$99.00

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Product Description

Features

  • Durable and precision machined 6061 aluminum billet construction
  • True vertical TDC movement
  • Pressure point remains in the same position for consistent results
  • Self-centering tri-lug locking centers inner barrel in place
  • CNC bucking sleeve centers orientation of buckings for lasting accuracy
  • Streamlined easy to adjust dial
  • Compatible with GHK and VFC M4 series gas blowback Airsoft rifles
Precision machined from solid 6061 aluminum billet, the Magnus Pro Hop-Up chamber features a true vertical TDC (Top-Dead-Center) movement. Which means regardless of your hop-up setting, the pressure point remains in the same position for consistent results. Revolutionary self-centering tri-lug locking is the most effective design at not only centering the inner barrel but also holding it firmly in place! CNC bucking sleeve precisely centers the orientation of hop up buckings and keep them in place for lasting accuracy. The adjustment dial is easily access through the ejection port & can be adjusted with any pointed tool without the need for disassembly, allowing efficient & streamlined hop-up tuning.

Manufacturer: 4UAD SmartAirsoft

Note for GHK: Install without the included spacer.
Note for VFC: Install with the included spacer.

3 Customer Reviews

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by Olivia W. on 05/26/2025
"Put this is my VFC V3 (the best gbbr system) and I can hop .45's easily. Combine with the unicorn 70 degree competition bucking and you'll be happy.
by Seth S. on 04/17/2025
"I have this installed on my VFC 727 along with the 4uad bucking and this right here is a god tier combo I’m able to hop bbs above .30g with accuracy and consistency good air seal the rotary style hop up adjustments within the chamber make adjustments easy with only needing a small Allen key no disassembly require super convenient the install video they have on there YouTube channel made install super easy and is super well done I highly recommend getting this but just know that this will not fit the HK416 models with the gas block adjustment you’ll have to buy the zparts outter barrel and make slight to the sides of the chamber but overall the best hop up and bucking I’ve used
by Dane H. on 05/16/2025
"Provides an excellent way to adjust hop. Tested .40 bbs and they easily overhopped so you can rest assured you have plenty of hop adjustment.

NOTE: 4UAD confirmed in their video here that this HopUp SHOULD NOT be used with V1 or V2 GHK M4s. You will have to buy a new V3 nozzle for this HopUp to work optimally. EVIKE, if you stock V3 only accessories, YOU SHIULD STOCK THE REQUIRED EXTRAS AS WELL!!!

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4UAD SmartAirsoft

About 4UAD SmartAirsoft

4UAD is a team of passion-driven enthusiasts on a mission to produce practical, systematic experiments on each aspect of Airsoft performance.