Pilum

Cost: 5 gp
Weight: 4 lbs.
Damage: 1d6 (small), 1d8 (medium)
Critical: x2
Range: 20 ft.
Type: Piercing
Category: Ranged Weapons
Proficiency: Martial
Weapon Groups Spears, Thrown
Special: See Text

The tip of this heavy javelin is designed to break off and embed itself into a shield once it hits. Like ammunition, a thrown pilum that hits its target is destroyed. If you hit a shieldbearing opponent with a pilum, he loses the AC bonuses from that shield until he takes a Standard Action to pry the remnants of the pilum from his shield.