Scot E - It will be tough to do with the supressor, with a muzzle brake no problem runs 15 lbs.
Jeff - The ATACR is nice but unless you need the extra moa (I do) the NXS will serve most people just as well forless money. The ATACR has better glass, more moa etc but in the field I just don't see where it has much of an advantage over the nxs unless you need the adjustment.