Looking to put a variable power scope on a new to me AR-10. Gun is a 16" piston rifle. Prefer at least a 3x9 or better but very open to suggestions. Good eye relief is pretty important. Rifle will be used to punch paper most of the time but could see some yote, rabbit, rat or even possibly deer duty. Budget is $300 or so but not really locked into a price if the quality is there. Any help would be great.