How would i upgrade this airsoft gun?

Question

i was thinking about buying it, what should i put in to get about 400 FPS?

http://www.airsoftgi.com/product_info.php?products_id=3740

Answer 1

Like h**l you could have got something better off ebay.  Did you buy it off ASGI?  They should have chronoed it.  I'm betting it shoots around 350+ and will last forever like that.  You would have to buy a 120 spring for about $15 and it will take you around 4 hours to replace it and I'll tell you right now I wish I had never done it.

OK, I just noticed you haven't done it.  Contact [e-mail] and ask them how much a bigger spring is to have installed.  They put a smaller spring in my 614 for free (that's the way they sell them) but most places won't let you play if you are over 400

Answer 2

that cost a lot you could have bought a better of ebay but i dotn know how to