Armored Core VI: Fires of Rubicon is FromSoftware's return to their mech franchise after a decade, featuring fast-paced mech combat with deep customization. You pilot an Armored Core (AC) built from hundreds of interchangeable parts across head, core, arms, legs, boosters, FCS, generator, and four weapon slots. The stagger system from Sekiro makes an appearance — filling an enemy's stagger bar opens them to massive damage. Three separate playthroughs with branching missions are required to see all endings and unlock all parts.
Your choice of weapons defines your damage output and playstyle. This guide ranks every major option, explains what makes each one strong, and tells you which builds they pair best with.
Weapons Rankings
| Weapon | Tier | Best For | Notes |
|---|---|---|---|
| Zimmerman Shotgun | S | Stagger builds, boss fights, close-range combat | A high-impact close-range shotgun that builds stagger incredibly fast. |
| Songbirds Grenade Launcher | A | Stagger support, AoE damage, medium range | Shoulder-mounted grenade launcher with high impact and AoE damage. |
| Pile Bunker | A | Melee builds, high-risk high-reward playstyle | A melee weapon that charges a devastating puncture attack. |
| Dual Gatling Guns | B | Sustained DPS, punishing stagger windows | Arm-mounted rapid-fire weapons that shred through enemy AP with sustained fire. |
| Laser Lance | B | Energy builds, anti-armor, mid-range burst damage | A shoulder-mounted energy weapon that fires a concentrated beam. |
S-Tier: Zimmerman Shotgun
A high-impact close-range shotgun that builds stagger incredibly fast. Two shots from dual Zimmermans can stagger most regular enemies. The go-to weapon for making bosses flinch and opening damage windows.
| Attribute | Detail |
|---|---|
| Tier | S |
| Best For | Stagger builds, boss fights, close-range combat |
| Key Mechanic | assembly system |
| Recommended Role | Lightweight Speedster |
How to get it: Available from mid-game onward. See our walkthrough for the exact progression point.
Best builds using Zimmerman Shotgun: Pairs naturally with Lightweight Speedster thanks to stat scaling synergies.
A-Tier: Songbirds Grenade Launcher
Shoulder-mounted grenade launcher with high impact and AoE damage. Fires in an arc that can hit behind cover. Combined with Zimmermans, this is the most reliable stagger combo in the game.
| Attribute | Detail |
|---|---|
| Tier | A |
| Best For | Stagger support, AoE damage, medium range |
| Key Mechanic | stagger mechanic |
| Recommended Role | Tank Build |
How to get it: Accessible in the early-to-mid game. Check our maps guide for the location.
Best builds using Songbirds Grenade Launcher: Pairs naturally with Tank Build thanks to stat scaling synergies.
A-Tier: Pile Bunker
A melee weapon that charges a devastating puncture attack. The charged hit deals the highest single-hit damage and stagger in the game but requires precise timing and positioning. Massively rewarding when mastered.
| Attribute | Detail |
|---|---|
| Tier | A |
| Best For | Melee builds, high-risk high-reward playstyle |
| Key Mechanic | assault boost |
| Recommended Role | Missile Boat |
How to get it: Accessible in the early-to-mid game. Check our maps guide for the location.
Best builds using Pile Bunker: Pairs naturally with Missile Boat thanks to stat scaling synergies.
B-Tier: Dual Gatling Guns
Arm-mounted rapid-fire weapons that shred through enemy AP with sustained fire. Low per-hit impact but the sheer volume of hits provides decent stagger over time. Excellent for chipping down staggered enemies during damage windows.
| Attribute | Detail |
|---|---|
| Tier | B |
| Best For | Sustained DPS, punishing stagger windows |
| Key Mechanic | energy management |
| Recommended Role | Melee Rusher |
How to get it: Found in later areas. Our walkthrough covers when you can access this.
Best builds using Dual Gatling Guns: Pairs naturally with Melee Rusher thanks to stat scaling synergies.
B-Tier: Laser Lance
A shoulder-mounted energy weapon that fires a concentrated beam. High damage and decent stagger with energy-based damage that bypasses some physical defenses. Requires good generator output to use frequently.
| Attribute | Detail |
|---|---|
| Tier | B |
| Best For | Energy builds, anti-armor, mid-range burst damage |
| Key Mechanic | arena ranking |
| Recommended Role | Balanced Middleweight |
How to get it: Found in later areas. Our walkthrough covers when you can access this.
Best builds using Laser Lance: Pairs naturally with Balanced Middleweight thanks to stat scaling synergies.
Weapons Progression Path
The order you should acquire weapons as you progress:
- Starting gear → Enough to clear Rubicon 3 Surface
- Songbirds Grenade Launcher → Your first real upgrade, available early
- Pile Bunker → Mid-game upgrade with good scaling
- Zimmerman Shotgun → Best-in-slot, aim for this by late game
- Upgrade to max → The power spike from max upgrades is enormous
Weapons Tips
- Always upgrade your primary weapon before diversifying — one strong option beats three mediocre ones.
- Match your weapons to your build's stat priorities for maximum scaling.
- Dual Zimmerman shotguns + Songbirds grenade launchers is the most reliable boss-killing setup for your first playthrough
- Check our tier list for how weapons rankings affect overall build effectiveness.
More Armored Core VI: Fires of Rubicon Guides
- Armored Core VI: Fires of Rubicon Armored Core VI: Fires of Rubicon Overview
- Armored Core VI: Fires of Rubicon Best Builds
- Armored Core VI: Fires of Rubicon Tier List
- Armored Core VI: Fires of Rubicon Walkthrough
- Armored Core VI: Fires of Rubicon Beginner's Guide
- Armored Core VI: Fires of Rubicon Tips & Tricks
- Armored Core VI: Fires of Rubicon Combat Guide
- Armored Core VI: Fires of Rubicon Boss Guide
- Armored Core VI: Fires of Rubicon Maps & Locations
- Armored Core VI: Fires of Rubicon Crafting Guide
- Armored Core VI: Fires of Rubicon Classes & Characters
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If you enjoy Armored Core VI: Fires of Rubicon, check out these related guides:
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- Monster Hunter Wilds Weapons Guide — action game with similar mechanics
