Centaur Weapon Familiarity

You've trained in the weapons favored by your people, becoming a skilled archer and jouster. You have familiarity with the lance, longbow, longspear, shortbow, and spear—for the purposes of proficiency, you treat any of these that are martial weapons as simple weapons.

At 5th level, whenever you get a critical hit with one of these weapons, you get its critical specialization effect.