Defender's Harpoon Gun

Defender's Harpoon Gun is a unique weapon featured in the Fallout 4 add-on Far Harbor.

Gameplay
Defender's Harpoon Gun is a unique harpoon gun that bears the Penetrating Legendary effect, meaning it ignores 30% of the target's damage and energy resistance, but is otherwise identical to its regular counterpart.

Variants

 * Harpoon gun - base version.
 * Admiral's Friend - Unique variant with the Instigating Legendary effect. It is sold by Allen Lee in Far Harbor.
 * Skipper's Last Stand - Unique variant with the Resilient legendary effect. It can be obtained as a quest reward for completing Shipbreaker.

Location
It can be obtained from the Mariner as a quest reward for completing Hull Breach 3.