Helldivers 2: AR/GL-21 One-Two Weapon Guide

The AR/GL-21 One-Two is one of those weapons that instantly grabs your attention the first time you scroll past it in the Armory. It's not just another assault rifle — it's a hybrid tool that mixes reliable automatic fire with a built-in under-barrel grenade launcher. In theory, it should let you handle almost any situation without swapping weapons. In practice, it's a bit more nuanced, and knowing how the One-Two works will help you decide whether it fits your loadout style.

Below is a full breakdown based on player questions, plus the official stats and tactical notes.

What Exactly Is the AR/GL-21 One-Two?

The One-Two is a primary assault rifle with an attached grenade launcher. Think of it as a “do-everything” gun: mid-range automatic fire for swarms and general fighting, plus a grenade launcher for hardened targets, bug holes, and clustered groups. The Armory even describes it as “Versatile, but heavy to wield.”

If you don't want to bring a dedicated explosive stratagem but still want a way to clear holes or stagger armored enemies, this weapon fills that gap.

Performance Compared to Other Primaries

The One-Two has 95 base damage, 650 RPM, and a mag size of 40 rounds, giving it solid but not top-tier DPS (1,029.16). On paper, it sits below the harder-hitting rifles but still delivers enough firepower for most mid-range engagements.

Where it loses points is ergonomics:

• It has an ergonomics rating of 29, compared to the Liberator's 65, meaning it slows you down more while aiming or turning.
• You can feel this “weight” during long firefights, especially against mobile targets.

If you want to offset the sluggish feel, using armor with Peak Physique helps noticeably.

Assault Rifle vs. Grenade Launcher — Which Side Is Stronger?

The rifle half is straightforward: fully automatic, stable enough with practice, and reliable for clearing small to medium enemies.

The grenade launcher half is where the One-Two shines:

• Fires 40mm grenades with Medium armor penetration.
• Has 3 spare grenades (much lower than the GP-31's 6 spare shots).
• Doesn't take a stratagem slot, giving you explosive utility “for free.”

So the hybrid system is balanced:

• Rifle for general use,
• Launcher for structures, tight groups, and medium armor.

Neither half completely replaces a dedicated weapon, but together they create a Swiss Army knife you can pull out in almost any mission.

Stats, Mechanics & Combat Feel

Damage, Armor Penetration, Fire Rate

• 95 damage per shot
• 650 rpm
• Light AP (8mm) for the rifle
• Medium AP (40mm) for the grenades
• DPS: 1,029.16
• 40-round magazine with 6 spare mags
• Recoil: 13

These stats tell us two things:

1. It hits reliably but isn't a boss-melter.
2. Ammo economy is tight — you only get 280 total bullets, lower than the Liberator's 405.

Under-Barrel Grenade Launcher (How It Works)

The launcher is simple to use and extremely flexible:

• Quick blasts for bug holes.
• Burst damage for groups.
• Medium penetration for armored bots or sturdy enemies.

Just remember: You only get three grenades. Every shot matters.

Switching Fire Modes

One of the One-Two's biggest strengths is how fast you can switch between rifle mode and launcher mode. 
The wiki even recommends keybinding Quick Weapon Wheel: Down so you can swap instantly without interrupting the fight.

Is It Heavy or Slow?

Yes — the ergonomics rating makes the weapon feel heavier while aiming and turning. You'll notice:

• Slower ADS movement
• Slightly sluggish camera movement while aiming

If mobility is a big part of your playstyle, this may take some getting used to.

How to Unlock the AR/GL-21 One-Two

The One-Two is found on Page 1 of the Python Commandos Premium Warbond and costs 35 Medals.

This makes it one of the earlier unlocks in that Warbond, so you don't need to grind deep pages to get it.

If you ever find yourself short on Medals and want a smoother path through the Warbond, some players simply choose to buy Helldivers 2 Medals online from U4GM for a quick and easy boost.

Is the AR/GL-21 One-Two Worth Unlocking?

If you like versatility, yes.

If your playstyle prefers specialization (high-damage rifles, long-range guns, or full explosive weapons), you may find it average.

It's worth unlocking if:

• You frequently play solo
• You want a built-in method to destroy bug holes
• You like flexible weapons that adapt to situations
• You don't want to bring a dedicated explosive stratagem

But if you're all about min-maxing DPS or mobility, you may prefer other weapons.

Best Use Cases & Mission Types

The One-Two fits well in:

• Bug missions (grenade launcher instantly deletes bug holes)
• Medium armored targets (launcher helps stagger and finish)
• Tight swarm fights (rifle handles adds while launcher clears clusters)

It's less ideal for:

• Long-range bot maps
• High-armor enemies
• Ammo-intensive missions

Does It Replace Dedicated Explosive Weapons?

Not fully.

The grenade launcher is extremely useful but:

• You only have 3 grenades
• No explosive stratagem = no heavy armor solutions

It's better seen as a supplement, not a replacement.

Recommended Loadouts

Here are setups that pair well with the One-Two:

1. Versatile Clear Setup

• Secondary: Machine pistol
• Backpack: Shield Generator
• Armor Passive: Peak Physique
• Stratagems: Eagle Cluster, Mortar Sentry

2. Anti-Armored Hybrid Build

• Secondary: Railgun or Breaker
• Backpack: Supply Pack (for ammo issues)
• Stratagems: Orbital Laser, Expendable Anti-Tank

3. Mobile Support Build

• Secondary: Pistol
• Armor: Anything with +Ergonomics or revive bonuses
• Stratagems: Guard Dog Rover, Eagle Airstrikes

The goal is to compensate for the weapon's:

• Low ammo
• Low ergonomics
• Limited grenade count

Community Thoughts — Fun or Underwhelming?

Player opinion tends to split into two camps:

People Who Love It

• Enjoy the hybrid flexibility
• Like solving problems without switching weapons
• Appreciate the grenade launcher utility

People Who Don't

• Feel the ergonomics drag them down
• Think the ammo economy is too tight
• Prefer higher-DPS options

It's not a meme weapon, but it's not a meta monster either. It sits comfortably in the middle as a “smart choice” for prepared players.

Summary

The AR/GL-21 One-Two is a versatile hybrid rifle that gives you both automatic fire and a built-in grenade launcher. It shines when clearing bug holes, handling medium armor, and adapting on the fly — but suffers from low ergonomics and limited ammo. If you like flexible tools and don't mind a slightly heavier handling feel, it's worth unlocking.