Fallout, Fallout 2 and Fallout Tactics
This trait reduces the Action Point cost of all throwing and firearm attacks by 1, but does not allow making Aimed Shots. Despite the description, in Fallout, it actually reduces the cost of all weapons, not just throwing and firearms. This was changed in the later games.
When combined with 10 Agility, "Bonus rate of Fire", "Sniper" and a turbo plasma rifle, it gives the player character 5 single-shot attacks per turn on average. Adding two ranks of "Action boy" into the mix allows for 3 consecutive bursts from a heavy weapon.
In the demo, the Vault Boy image for this trait is used by the Small Guns skill. Its filename also says "AMDIDEXT" (apparently for "ambidextrous"), as though it could have been an opposite of the One Hander trait.
Fallout: New Vegas
- Automatic weapons' fire rates are not affected by fire rate bonuses.
- Fast Shot and Trigger Discipline use multipliers, meaning that the product of all bonuses and maluses of both traits are 0.96, resulting in an all-around loss if both traits are taken.