Atomix Vision Impulse w/
ccm low rise
eyes...everything else is preference...but i would suggest cp trigger, low rise, blind bolt, delrin ball dents, chaos board, mac dev red valve, mac dev sonic lpr, mac dev gladiator reg. etc.
Good gun to upgrade
can be bouncy (but thats the boards fault)
Basically this has been my back up gun for a while...i usually used my friends angels when i could...i was going to upgrade this gun into a gun that could compete with the best, but then i realized that it would cost be about five hundred dollars to do that...so i bought my atomix impulse with has all the ups i would have put on my b2k only my atomix is far better looking and did take as much time to build.
The main problems with the gun is that it chops...like crazy, especially since i have the chaos board in it and for some reason it bounces like crazy too. The gun is kinda heavy but nothing overwhelming. Also you tend to find that the wiring needs to be redone on these older electros which is a pain in the a$$...so for the money get something else there are plenty of good cheap guns out there.
Basically the gun ok if you get a cheap one off ebay and put a couple hundred dollars into making it keep up with the electros of today...if your not willing to do that save your self some money and time and get a cheap impulse or a newer bushmaster...i give it a seven because with todays standards there are much more efficient and faster guns for the money.