I purchased the deressonator, not the tuner. My plan, i think, is to remove the barrel and place it against the breach block. Again, not sure if this will help with barrel whip being placed over the carbon fiber sleeve. I also purchased a barrel collar to slip over the barrel, preferably towards the muzzle, as you suggested, but with the RAW's new moderator design, im not entirely sure how to go about this. There is about 3/4 inch of actual muzzle exposed and then there is an aluminum tube, internally threaded for the second stage of the mod to screw on so if i cant figure out how/where to place it, i was thinking of putting it further down the barrel, past the moderator but everywhere i look, the tuning weight is always at the muzzle so does placing it say halfway down the barrel, not work for tuning?