Originally Posted by DONSTER 125
if the gearbox comes with nylon bushings, replace them with metal ones. Your current battery sounds find IMHO. replace the crappy systema barrel with either a Prometheus, Madbull or KM. They are solid performers and not that pricy. I personally think that systema barrels suck. what is your mechbox upgraded with? it might need more than you think.
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here is my mech box upgrade: http://www.airsplat.com/Items/AC-UPI-MA120K.htm