what compontes are you using in your 20" bull barrel kit? What kind of accuracy can I expect from it? And last what is your turn about time for the 20" flat top bull kit?  thanks.

On a standard bull kit it comes with a Shaw bull barrel, either an FN or DPMS Hi-Rise, FN or Colt contract internals.  Groups have ranged from .22" - 1.25", typically they average ~.5" once the barrel is broken in and you discover the load that your barrel likes.  As of last Wednesday we were waiting on flattops, but I'm not sure what the status is since then.  You can call to check the exact time frame.

I just ordered the 20" bull kit.  However, I forgot to ask how do you recommend breaking in the barrel on this kit?

The way that I was taught was to clean after each round for the first 15 rds., then after every other round for the next 15 rds., and then after every 5th round for the remainder of the barrel's life.