Weapon Expertise

Heroic Tier
Benefit: Choose a weapon group. You gain a +1 feat bonus to attack rolls with any weapon power you use with a weapon from that group. The bonus increases to +2 at 11th level and +3 at 21st level.
Special: You can take this feat more than once. Each time you select this feat, choose another weapon group.

Published in Player's Handbook 2, page(s) 190.