lol alright alright. Im in the process of making a pro and con about B2K's, so I can just copy paste it into here.
Stock is pretty fast
Stock regs are not that bad either
Stock Bolt is good, high flow, delrin
Easy to maintain
Low Operating Pressure
4 way noid
PDS = Breakbeam = One of the best eye systems
4 way adjustable Trigger
Gas Hog to begin with, break it in
Stock Barrel is as only good as the paint you put in it, get a better barrel however
Stock Wire Harness is more of a pain to work with, but getting a new one (sig*cough*) would be better if you want to tinker a lot with it.
Non Clamping Feedneck
Thats about it....
Always use HPA and get a forefeed hopper.