Halfling Weapon Familiarity Feat 1
Source Pathfinder Core Rulebook
You favor traditional halfling weapons, so you've learned how to use them more effectively. You have the trained proficiency with the Sling, Halfling Sling Staff, and Shortsword.
You gain access to all uncommon halfling weapons. For the purpose of determining your proficiency, martial halfling weapons are simple weapons and advanced halfling weapons are martial weapons.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
HalflingA creature with this trait is a member of the halfling ancestry. These small people are friendly wanderers considered to be lucky. An ability with this trait can be used or selected only by halflings. A weapon with this trait is created and used by halflings.