I actually wanted this before my SCAR, but they had not released the MR556 yet. Well I have finally been able to afford the rifle, and no I have not sold my SCAR. I am liking how this baby shoots, but I did have to go ahead and replace the birdcage flash hider with the PWS FSC556. I have also changed the gas block with the one that is equipped with a bayonet lug. One has to add the "evil" factor.