Harpak

The Harpak is a harpoon gun of Grineer origin added in Update 17. It has two firing modes; in the first, it fires a burst of three harpoon projectiles. In the second, it charges up to fire a harpoon with a trailing chain that will damage foes and pull most targets towards the user. Certain enemies, especially flying enemies such as Regulators and Ospreys, are immune to this.

The Harpak has fairly strong recoil, but is accurate, and its harpoons are fast and have little drop. Its firing noise also increases in pitch as the magazine depletes, to warn the user that they will need to reload soon.

Characteristics
This weapon deals primarily damage.

As a burst-firing weapon, it has the usual pros and cons of burst-fire weapons such as the Burston and Tiberon.

Advantages:
 * Deals respectable damage, effective against many Grineer units.
 * Alt fire can reel enemies in close and knock them prone, leaving them open for melee finishers.
 * Can also 'pull' humanoid flyers (such as Hellions) down, and pull enemies that are stunned by Warframe powers.
 * Harpoon pull can interrupt enemy casting/power animations, including the chargeup for Railgun MOA units.
 * Decent base crit chance and damage.
 * Quick reload.

Disadvantages:
 * Harpoons are physical projectiles and thus have travel time.
 * Alt-fire mode has very short range, does not work on flyers such as Ospreys.
 * Cannot pull enemies through or around most objects, less effective against opponents in cover.
 * May fling enemies into pits or inaccessible areas, causing loss of dropped items or affinity.

Acquisition
The Harpak may be purchased directly from the Marketplace using platinum, or its blueprint may be purchased from the Marketplace and used to build it.

Trivia

 * The Harpak was first presented in the Update 17 Teaser Site, but its name was not revealed until the release of the Echoes of the Sentients Highlight Video.