Can only be used in conjunction with an equipped Heavy Bowgun weapon.

If you are prone, and do not move on your turn (other than laying prone), you may use your bonus action to spend this weapon's charge and activate Wyvernsnipe ammunition. On your next turn, your Heavy Bowgun's range is tripled, and deals an additional 3d12 pierce damage for its first attack, and is a critical hit on an attack roll of 18-20.