Penta

"The Penta Launcher fires up to five grenades that can be remotely triggered at just the right moment."

- In-Game Description

 is a Corpus Grenade launcher. It launches ballistic grenades with primary fire, and detonates all active grenades with the Zoom feature.

Damage listed in game is damage from physical grenade impact with a target. The explosion is significantly more powerful.

Characteristics
Advantages:
 * High AoE Damage.
 * 350 Blast damage that can be increased by mods.
 * A maxed Firestorm increases the blast radius up to 6.2 meters.
 * Combined Fire and Cold mods will create additional Blast damage, which will be applied to the explosion damage after damage mods (like Serration).
 * Capable of firing more than one grenade before detonating.
 * Grenades deal Impact damage when hitting an enemy.
 * Deals 50% more damage to shields.
 * High ammo efficiency.
 * Heavy Caliber doesn't reduce the accuracy of the Penta (may be fixed).
 * Explosion can also cause procs.
 * Less explosion damage results in less damage dealt to self in comparison to the Ogris.
 * Relatively inexpensive acquisition costs.

Disadvantages:
 * Explosion deals Blast damage, which cannot be changed into another type.
 * Blast deals 25% less damage to Armor.
 * Impact damage of the grenade deals 25% less damage to flesh.
 * Can only have five grenades out at once.
 * When using the Split Chamber mod, the extra projectiles count toward the limit of five live grenades.
 * Grenades that have stopped moving have no obvious visual or audio cue (but with "PhysX" enabled they have some sparks when come to complete rest).
 * Grenades have slow projectile speed travel time and heavy arcing.
 * Grenades have a high bouncing capability which makes it hard to stack on desired spot.
 * Requires Mastery Level of 6.
 * Increasing magazine capacity does not allow you to have more then 5 grenades out at once, and after detonating the maximum of 5 at once you will have less to start in the magazine, forcing you to reload to shoot another 5.
 * Explosion cannot deal a critical hit.

Acquisition
The can be purchased for  and the blueprints for.

Weapon Loadouts
See the user build section for builds using this weapon.

Tips

 * Grenades fired from the Penta are lobbed in a heavy arc, allowing the player to kill enemies hiding behind cover much more easily, as the detonation happens upon external trigger.
 * Multiple impacts dealt by the same grenade are possible.
 * Standing at a greater height allows for the grenades to be lobbed and bounce further, allows the user to see the grenade better, as well as eliminating the worry of self-damage.
 * It is not recommended to use Shred as grenades can often go through the floor on some tilesets, making it impossible to bounce every time.
 * When using the Split Chamber mod in conjunction with Heavy Caliber, the decreased accuracy puts the grenades side-by-side and you can clearly see 6 total grenades out at once. This is most likely a bug due to split chamber forcing an additional grenade to spawn on the last shot.
 * Split Chamber, under random circumstances, can fire a total of six grenades. Provided multishot works on every shot, 2 shots puts out 4 grenades, allowing you to fire a third for the 5 total limit, but with 1 extra from the multishot.
 * Modding with Speed Trigger is an efficient alternative to quickly launch up to the grenade limit.
 * Elemental mods such as Cryo Rounds and Hellfire are external from the main Blast damage, allowing the weapon to have 3 seperate elemental combinations. If one creates a Blast damage combination, it will merely add itself to the main explosion damage.
 * When using the Penta with a Waframe other then Trinity, Rhino or Frost, be extra cautious and do not attempt to use in small areas. A single fully-modded grenade can usually kill any warframe unless protected in some way.
 * Players can prematurely detonate grenades in mid-air, which deals headshot damage to targets below.
 * The Penta is a very effective weapon when firing from a safe location on an Infested mission.
 * Default color of grenades make it hard to see once in the middle of a crowd of enemies or from them randomly bouncing around and you lose track of them. Change the energy color to something bright, and include 3 different energy color sets, one for each general kind of tile set (eg, don't use bright white for Corpus Outpost missions).
 * Be wary when installing Infected Clip, as the Toxin damage can bypass Warframe shields and deal damage directly health.

Trivia

 * Released in Update 11.3.0.
 * This is the first weapon to have the Zoom capability replaced with a different function.
 * Penta derives from the Greek prefix of "five", which makes sense as the grenade launcher composes a clip of 5 grenades.
 * This seems to be the first Corpus weapon to be named after Greek origin instead of Latin.
 * Penta is the third weapon model that has a clip that responds after firing. First being the Twin Gremlins, and the second is the Soma.
 * Its model is known to be a non-static model, as the upper barrel shaft shifts when reloading.
 * It seems the entire gun represents a mere skeletal structure, unlike most Corpus weaponry.
 * The grenades are flat and rectangular, which is odd considering their bouncy movement.
 * Increasing the magazine size actually increases the visiable grenades stored in the weapon, being the first weapon with this obvious visual ammunition increase.
 * The Penta is the first Corpus weapon to focus on explosive weaponry, utilizing the technology on Plasma grenades through a launch system. They however deal blast damage, which does not fit the corpus theme.

Bugs

 * Rarely a detonation will cause damage to you even if the grenade is well beyond the explosion radius. (Online issue)
 * In its Arsenal UI, it does not display its trigger function, though it functions as Semi-Auto.
 * Occasionally, the flames emitted by the Penta can remain indefinitely if reloaded too frequently.