Upgrades for ICS MP5 A4

I don't thing im going to do much upgrading to my MP5. Unless i get into more tactical things, but just for the record... What upgrades would you recommend for this...

Im not really sure what you need. Just to clear the air on this, what areas are you looking to improve?
ROF? FPS? Reliability?

Right now idk. I like it how it is. I was just looking like down the road a little bit.

Most likely FPS and Reliability

Im assuming that the MP5 clone use a V2 TM cloned MB. am i right?

For starters improving FPS will require a spring upgrade if need be. Sometimes its better to just put in a TB barrel and call it done which is what I reccomend, it will be way cheaper in the long run.
Reliability, because your gun is ICS it is likely to have metal shims and metal bushings already installed. If so you really don't need to do much. Adding a spring guide and a polycarbonate piston head is really all you need to do.

http://www.airsoftgi.com/product_info.php?cPath=31_51&products_id=393 - Aera 1000 V.2 Spring guide.
http://www.airsplat.com/Items/AC-UPI-ZS-A08.htm - Systema V.2 polycarbonate piston head.