When the player character is standing or crouching in place, it adds +5 points of damage to weapons and +10 points to Damage Resistance. The benefits are reported in the Pip-Boy under the "Effects" screen.
The +5 damage is added to each bullet, making it far more powerful when used with automatic weapons, especially with the Minigun or the Gatling Laser, and their variants. The Minigun will have its damage almost tripled.
Behind the scenes
The icon resembles a Greek Hoplite.
- Because the player must be standing still to use the Pip-Boy, the +5 damage effect and DR bonus appears to be constantly in effect unless the player is in the air. The bonus is applied correctly, however. It is purely a visual bug.