Switch your rifle to Three-Shot-Burst mode, increasing your effective range and firing three 200-damage shots every 0.4s.
Gain 25% Lifesteal while using Iron Sights.
Increase your Movement Speed by 40% while using Iron Sights.
Reduce the Cooldown of Frag Grenade by 3s for each enemy hit by it.
Reduce your weapon recoil by 40% while using Iron Sights.
Increase your maximum Health by 50.