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question about GBBR to HPA conversion

847 Views 1 Reply 2 Participants Last post by  Spoon
Hello everyone.
My friend want's to sell me his 'King Arms Colt M4A1 GBBR' very cheap..
Here is a link:
So i thought about converting it to HPA.

My question is:
Can i just buy a tank, regulator, hose and a quick connector to screw into the mag.. And that's it?

Hopefully you guys can tell me more about this, because i don't know ANYTHING about HPA..

Please post some parts and tell me what i need to convert :D

Thank you guys! :rolleyes:
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