Barrel (Freak or Ultralite)
Board (Nox or Chaos)
Price (got mine for $120)
This gun is amazing. I bought mine for $120 and it keeps up with my friends $1200 ego. When this gun is upgraded to its maximum potential its practically unstoppable. The only problem is when you get the gun stock its not so great. The stock board is kinda slow and the high pressure reg is horrible. Also the wires inside the frame are very fragile and the break very easy if your not careful. I have a all black b2k4 w/o PDS and it chops like crazy, even with my DXS pulse on it. With the PDS there is no chops so i dont have to worry about cleaning a thing out on the field. I bought this over an ion because ions are so common, almost everybody at my field has one and i wanted to be different. So I bought the B2K4 and it is much better than any ion in my opinion.
Nothings perfect i would give it a 9.5/10 with all the upgrades, stock its about a 6.5 or 7. But for $120 it is very well made and I consider it a steal.