burris 4x scope burris 4x burris veracity ph 4-20x50 burris fullfield iv 4-16x50 burris xtr ii 4- 20x50mm burris eliminator iii 4-16x50 burris rifle scope 4x12x42 burris veracity ph 4-20x50 illuminated burris veracity 4-20x50 burris xtr 2 4-20x50