Given the preponderance of body armour on today's battlefield, I would hope its in a 30 cal of some flavour for the availability of fmj and armour piercing projos.
It appears to be fitted with a suppressor, which is smart.
The term 'sniper' gets bandied about far too frequently. Most are referring to someone who can shoot accurately ( a marksman). A true sniper's skillsets are only about 30% being a very good shot. The rest is attributed to fieldcraft and personal characteristics
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