I bought the cheap version CYMA AK47 from tactoys, I’m just wondering if there are any hop up systems online or if I can get one 3D printed.
Also, what is the best O ring for the gun?
Thanks.
I’m not sure what it’s muzzle threading is, if it even has any, so I can’t help with the hop up, but. Any green silicon o-ring of the correct size should be an upgrade over the default black rubber.
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What size should I go with?
I don’t have any money right now sorry, or a credit card or anything. I’m 15 so I barely have anything. I just wanted prices so I know what to save up for.
Thanks anyway.
alright mate, you drive a hard bargain… PM me and ill print and send you one for free.
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I’m not much of an AEG gal, so the specifics kind of escape me, but. If you go down to Tac Edge or X-Force or something, and ask their techs, they should be able to point you in the right direction. They might be able to give you some other upgrade ideas, too 
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20mm x 2.5mm they are.
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Is that measurement for the O ring?
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Yes, it should be. It’s what I use in all of mine.
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