Piranha STS Core

[bdcoak]

My STS Core seems to chop alot of balls. What should be the first upgrades I should get?

[Dermen]

Is it chopping the balls or breaking them in the barrel. If they are breaking in the barrel you need to use different paint or get a new barrel which you should do anyway because the stock isnt that good.
If you are chopping balls:
Are you shooting cheap paint? If so then buy qualitly paint like RPS. When it comes to paint you get what you pay for.
Does it only happen when you shoot fast? If so then get a revvy.
Check the front of your bolt and make sure it is smooth. Also check to make sure your powerfeed isnt off a little bit. And check your ball detent.

[bdcoak]

Its mainly bursting in the barrel. Sometimes when shooting fast, other times they just burst. What does a rewy do?

[Dermen]

If the balls are breaking in the barrel then it is simple. You are using either bad paint or paint that is a bad match for your barrel. BE paint, old paint, and paint that got wet are all bad. If you dont have an aftermarket barrel then I suggest getting one. CP, Lapco bigshot, and J&J Ceramics are all good barrels and cost around $50. A revvy is an agitating hopper. It makes paint feed faster. You dont really need one unless you are chopping paint alot.