magmoormaster : thank for your answer , i will check the CP barell and i will pitch more money.

a new barrel is the best/first upgrade. i presonally don't feel anything special towards the cyclone but i had a haloB on mine and it worked flawlessly and I could use it on my PMR when I wanted to play with it instead. You could also go with a qloader and mount it like an m203 for that tactical look.
Also HPA instead of C02.

I would get a new barrel. The Custom Products Barrel is a very good choice as suggested.

Polish the internals like stated earlier. There is a tutitorial on here I think, but I know that there is one in Instructables.com for sure.

The rest is really up to you. I would probally go HPA as the next upgrade as well and maybe get a remote so you can take weight off the marker.

Another upgrade that you might consider is getting a stock, especially if you are running a remote so you can "Aim" better.

Past that, the sky is the limit as long as your checkbook holds.

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Warriors do not bend or break their code to suit there needs. They continue to fight reguardless of the circumstances.

Does that actually work?

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you could do a magnetic trigger mod also. if you like to do stuff yourself. And as far as polishing goes.. i think it makes no difference as long as there is not a lot of paint in there and it is oiled up. but thats just me. but anyhow it does no harm at least so..