Technical information

Practical A.E.G Upgrade 2006

What can cause the hopup rubber to break?

I have to wind my hop almost all the way up just to get flat flight. What is

wrong?

Extreme cold weather can cause the hopup rubber to get hardened and break.

Release the hopup rubber after every game and apply sufficient silicon oil spray

to the rubber surface. If it is snowing outside, the weather is cold enough to

justify staying home rather than airsofting.

If your hopup does not produce the desired effectiveness, chance is that the

hopup spacer is too soft.

You can buy replacement made by Systema or Guarder, but a lot of the time you

can save time and $ by using simple quick fixes. For example, to “harden” the

spacer a little bit, you may insert a small piece of electric wire into it so the space

inside is effectively filled up. Or, you can use the ink tube inside a pen as a cheap

replacement. You just have to look for one with identical dimension.

Another possible cause is that your gun is equipped with a poor quality

hopup rubber. We found that it takes time for certain China/Korea

made hopup rubber units to “warm up” (even under regular

temperature) just to generate enough friction for producing the needed

back spinning effect on the bullets. Generally speaking, by emptying a

hi-cap under full auto mode you can properly warm up these hopup

rubbers.