Hop Up Chamber 4uad 4uantum Magnus Pro Precision AR (GHK/VFC)

Want to get more precision and consistency from your airsoft rifle? Then the 4uad 4uantum Magnus Pro Precision AR is a hop-up unit that aims for that. It's an aluminium hop-up chamber with a series of well-thought-out solutions that go a step further than standard hop-ups.

Adjustment is easy via an adjustment knob. You don't need to open the replica: with a 1.5 mm Allen key you adjust the hop-up through the ejection port.

Central to the design is the sealing system that closes the chamber around the barrel. By turning a clamping ring, three internal lugs clamp the chamber tight and centered, without play. This benefits stability, and your shots become more consistent.

The bucking is made using CNC technology and has visible notches. These show when the bucking is fully centered on the barrel, which ensures lasting accuracy and a stable, higher velocity of the BBs.

At TDC (Top Dead Centre) there is also a precisely engineered notch for the nub. The nub thereby stays firmly in place and maintains a stable contact point on the bucking, so the BBs get good backspin. For those who want to boost their GBB performance, a logical upgrade.

4uad 4uantum Magnus Pro Precision AR (GHK/VFC) hop-up chamber features:

• Fits GHK and VFC
• Easy to adjust
• Made from 6061 aluminium
• Nub with stable contact point on the bucking
• Innovative sealing system for tight clamping
• CNC bucking that centers precisely