So imma have a nerd moment right here, you can tell that's not a .50 cal rifle because it is either an AWM or an AWP which stand for either Arctic Warfare Magnum (which is chambered in .338 Lapua Magnum) or Arctic Warfare Police which is chambered in the .308 Winchester cartridge. Neither of those rounds are .50 caliber, however it is understandable that you might have assumed that, because I doubt for some reason that a .308 Win or .338 Lap Mag would pierce dragon scale. A .50 (or larger) caliber anti material rifle such as the M2A2 Barrett would be much more suitable for the task.