Quote:
Originally Posted by kullwarrior
5-7 uses a high kick system, it kicks really hard for a 134a gas gun. Using propane you will destroy the hop-up chamber assembly.
Sadly there's no third party support for that.
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Actually, the problem part on the 5-7 isn't the hopup. The design of the gun is a bit odd in that the barrel is the guide rod for the main spring, and the way its held into the hopup chamber is a rather poor design considering the weak aluminum the outer barrel is made of. Firing on propane will cause the barrel to breat inside the hopup.
You need to replace that with an aftermarket barrel, preferably steel. There are several different after-market models.
I will agree though that the 5-7 is better suited to people with larger hands.