Undercurrent (Adept) - Legendary Grenade Launcher

Undercurrent (Adept) is a Grenade Launcher Arc Special in Destiny 2. Review its base stats, perk pool, and masterwork options.

Weapon overview

Grenade Launcher - Arc - Special - Wave Frame

Source: Grandmaster Nightfall

The river embraces all. Struggle is futile.

One-shot handheld Grenade Launcher. Projectiles release a wave of energy when they contact the ground.

Volatile Launch
This weapon is optimized for an especially explosive payload.
• Greatly increases blast radius
• Slightly decreases handling speed
• Slightly decreases projectile speed
Confined Launch
This weapon's launch parameters are particularly stable.
• Greatly increases stability
• Increases blast radius
• Decreases projectile speed
Countermass
This weapon is weighted for vertical recoil.
• Greatly controls recoil
• Increases stability
• Increases handling speed
Hard Launch
This weapon's launch barrel is optimized for projectile speed.
• Greatly increases projectile speed
• Decreases stability
• Slightly decreases blast radius
Linear Compensator
This weapon's launch barrel is well-balanced.
• Slightly increases projectile speed
• Slightly increases blast radius
• Slightly increases stability
Quick Launch
This weapon's barrel provides faster projectiles and much faster aiming.
• Greatly increases handling speed
• Increases projectile speed
Smart Drift Control
This barrel is broadly optimized for firing control.
• Moderately controls recoil
• Increases stability
• Increases handling speed
• Slightly increases projectile speed

High-Velocity Rounds
This weapon's projectiles are particularly light and quick.
• Increases projectile speed
• Increases reload speed
Implosion Rounds
This weapon's projectiles travel faster and have a controlled explosion.
• Increases projectile speed
• Greatly increases stability
• Decreases blast radius

Lead from Gold
Picking up Heavy ammo also grants ammo to this weapon.
Field Prep
Increases ammo generation. Faster reload, stow, and ready speed when you're crouching.
Stats for All
Hitting three separate targets increases weapon handling, stability, reload, and range for a moderate duration.
Ambitious Assassin
Overflows the magazine based on the number of rapid kills before reloading.
Eddy Current
Temporarily increases reload speed and handling after sprinting or while amplified. This effect is improved when you are amplified.
Demolitionist
Kills with this weapon generate grenade energy. Activating your grenade ability reloads this weapon from reserves.

Voltshot
Reloading this weapon after defeating a target overcharges this weapon for a short period of time, causing it to jolt on its next hit.
One for All
Hitting three separate targets increases damage for a moderate duration.
Bait and Switch
Deal damage with all equipped weapons within a short time to give this weapon a damage boost.
Adrenaline Junkie
This weapon gains increased damage and handling from final blows with grenades or this weapon.
Attrition Orbs
Dealing sustained damage creates an Orb of Power.
High Ground
Final blows with this weapon grant stacks of bonus damage. Attacking targets from higher ground immediately grants the maximum number of stacks.

Stunning Recovery
Stunning a Champion refills your magazine, triggers health regeneration, and improves recovery for a short duration.
Vanguard's Vindication
Final blows with this weapon grant a small amount of health.