Concentrated Fire

Concentrated Fire is a Fallout 3, Fallout: New Vegas, Fallout 4, and Fallout 76 perk.

Fallout 3 and Fallout: New Vegas
Each successive time you target the same body part in V.A.T.S., your chance-to-hit raises by +5%. So, if your first to-hit was 40%, 2nd would be 45%, 50%, etc. This can lead to very easy head-shots when teamed with other to-hit % boosters (Sniper, Commando, etc.)

Bugs
In Fallout 4, the second rank of this perk does not work, although the first and third ranks do.
 * This is caused by the second rank incorrectly affecting the V.A.T.S. damage by 15% similar to rank 3 of the perk.

Gallery
Massiertes Feuer Fuego concentrado Tir Groupé Skoncentrowany ostrzał Массированный огонь Масований вогонь