Since it's russian roulette, there should be a
certain chance to shoot special rounds, like crits
(3%) Chance to Missfire (Takes 95HP away, very rare occurance! russian roulette man!)
(x%) Chance to Minicrit
(x%) Chance to Crit normally.
(80% Chance to fire normally)

Either fire buckshot, or fire slugs (Slugs should do around 75/80 Damage per shot)

On take out

-15% Health
+10% Movement speed
+20% From melee damage

6 Bullet clip size.