This has got to be one of the best low/mid-priced balls on the market. A must ball in everyone's arsenal for when the heads have been broken down from all the new 'Active' balls that are thrown today.  I threw this ball in league one night, not too long ago, playing in an area of the lane where no one else could play.  The 7-8 board area was fried, and everyone else was playing the second arrow in.  Playing right up the 7-8 board and bumping the dry out to about 5-6, I shot 290 out of the gate with this awesome piece of equipment!  What makes the Attack Zone MR so good is its ability to just ignore the heads when they're toast.  

I drilled this up with a 0-1" pin, in a stack-leverage pattern with the CG at grip center 12:00 with the pin.  This is also a wonderful ball to have to complement the ProActive equipment you may have in your bag.  When the shot is gone, and even your Riot Zone-ProActive Purple Pearl can't clear the heads, then just pull out the MR Attack and you'll be back in play.  A Danger Zone-Pro HPH (or Azure Zone-Pro), Danger Zone-Pro HPD (or Navy Quantum), Riot Zone-Pro Purple Pearl, and Attack Zone MR would be the perfect four ball arsenal for any player!

Good luck!