I dont know about the ACR but some time ago I posted speeds for ragnarok PS3 and XBOX for zero recoil for the G36C. It still shoots almost full speed and every bullet hits dead on the other bullet. U can shoot across the whole map into a wall and it will look like u only shot one bullet in the wall. Thats how dead accurate it is. If Im not mistaken it does a pretty good job with the ACR as well. Ill find my old thread then update it to this thread for u guys to try out.
Ok found my old thread the magic sps is 10.3. try that on the ACR but I would deffenently suggest using the G36C. U can ring headshots across the map all day with the ACOG scope. Check it out!