Hardened increases the surface penetration for any guns fired by the user. Its pro version increases the damage of bullets against killstreaks by 25% and reduces the effects of flinching when damaged by 80%.

• Penetration Kills - Get 10 kills using Hardened and shooting through walls.
• Bullets in Aircraft - Shoot 200 bullets into enemy aircraft.
• Equipment Shot - Destroy 1 piece of enemy equipment through a wall.