The soldiers reaching for their pistols are the more dangerous of the group, but he has an angle on the man next to him. The leader giving the order to kill removes any doubt about the situation from Niko's mind and he springs to action throwing a big overhand right at the soldier's temple.

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Unarmed attack: (1d20+4)[12]
Damage: (1d8+1)[8]
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crit: (1d20+4)[18]
dmg: (1d8+2)[7]