Airsoft: Tokyo Marui Hi Capa 5.1 performance upgrades?

I have seen some people upgrade their Hi capas to go over 350 fps. How do they do that please tell me the upgrade parts!

Answers:

Beretta 9mm?

i was reading a review about your gun and they said that they used green gas for the pistol instead of HFC134. They say you should only use HFC134 which it was desinged for. You can put in High Capa Flow valve, a better spring, and better slide. Then you can use green gas. if you don't know how to upgrade you pistol. i bet you could go to airsoftatlanta.com and email them if they would put in those upgraded parts.

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