Going to purchase a RRA predator pursuit 20" barrel (8.1lbs) or 18" varmint A4(8.7lbs). Thinking of getting a Leupold Mark AR scope 4-12x40. I can get the scope for $370. Any suggestions on gun or other scope in the $350 to $400 range. Will be used for coyote hunting and maybe someday some praire dog hunts. Can't decide on which gun do to weight; not alot of difference but the varmint seems alittle nose heavy.