R-36 Eruptor

Last updated: 1.003.000
Current patch: 1.005.001

Weapons

Primary Weapons

Explosives

R-36 Eruptor

“

This bolt-action rifle fires jet-assisted shells that explode shrapnel in all directions upon impact. Not recommended for close-quarters use.

— Armory Description

R-36 Eruptor is a Primary Weapon that fires jet-assisted shells which inflict impact, explosion and shrapnel damage.

Procurement

R-36 Eruptor is unlocked on the 2nd page of the Democratic Detonation Premium Warbond for 60 Medals.

Detailed Weapon Statistics

R-36 ERUPTOR
Fire Rate	32 rpm
Recoil	57.5
Horizontal Recoil	40
Vertical Recoil	75
Spread	↔[5.00] ↕[5.00]
Sway	0.8
Ergonomics	25
Capacity	5
Spare Magazines	6
Starting Magazines	4
Mags from Supply	6
Mags from Ammo Box	3
Attacks
*15x100mm HIGH EXPLOSIVE P	Projectile
**15x100mm HIGH EXPLOSIVE P IE	Explosion
***SHRAPNEL P	Projectile

15x100mm HIGH EXPLOSIVE P
Projectile
Caliber	15 mm
Mass	100 g
Initial Velocity	180 m/s
Drag Factor	0%
Gravity Factor	30%
Lifetime	1 sec
Penetration Slowdown	25%
Explosion On Impact	15x100mm HIGH EXPLOSIVE_P_IE
Explode After	15x100mm HIGH EXPLOSIVE_P_IE
Damage
Standard	230 Ballistic
vs. Durable	115 Ballistic
Penetration
Direct	Heavy
Slight Angle	Heavy
Large Angle	Heavy
Extreme Angle	Unarmored I
Special Effects
Demolition Force	30
Stagger Force	35
Push Force	20

15x100mm HIGH EXPLOSIVE P IE
Area of Effect
Inner Radius	4 m
Outer Radius	7 m
Shockwave Radius	8 m
Shrapnel Count	30
Shrapnel	SHRAPNEL_P
Damage
Damage Element	None
Inner Radius	225 Explosion
Inner Durable	225 Explosion
Outer Radius	224 - 0
Outer Durable	224 - 0
Penetration
Direct	Medium
AoE Effect
Demolition Force	20
Stagger Force	35
Push Force	40

SHRAPNEL P
Projectile
Caliber	10 mm
Mass	100 g
Initial Velocity	30 m/s
Drag Factor	40%
Gravity Factor	100%
Penetration Slowdown	25%
Damage
Standard	110 Ballistic
vs. Durable	35 Ballistic
Penetration
Direct	Medium
Slight Angle	Medium
Large Angle	Light
Extreme Angle	Unarmored I
Special Effects
Demolition Force	10
Stagger Force	10
Push Force	20

Attachments

Weapon	Category	Attachment Name	Unlock Level	Unlock Cost	Effect
Eruptor	Optics	10x Sniper Scope	Weapon Level 1	0
		Holographic Sight	Weapon Level 3	5,000	ERGONOMICS 9
		Reflex Sight Mk2	Weapon Level 9	7,000	ERGONOMICS 9
		Iron Sight	Weapon Level 12	7,000	ERGONOMICS 14
		2x Tube Red Dot	Weapon Level 19	13,000	ERGONOMICS 6
		4x Combat Scope	Weapon Level 24	25,000	ERGONOMICS 3
	Underbarrel	No Underbarrel	Weapon Level 1	0
		Laser Sight W/ Flashlight	Weapon Level 2	3,000	ERGONOMICS -5
		Vertical Foregrip	Weapon Level 8	3,000	ERGONOMICS -5, VERTICAL RECOIL -25
		Angled Foregrip	Weapon Level 14	5,000	ERGONOMICS 5, VERTICAL RECOIL 29
		Flashlight Vertical Foregrip	Weapon Level 18	7,000	ERGONOMICS -7, VERTICAL RECOIL -25
		Laser Sight Angled Foregrip	Weapon Level 22	7,000	ERGONOMICS 3, VERTICAL RECOIL 29

Tactical Information

• Eruptor excels at delivering devastating area damage with each shot but suffers from a very low firing rate and limited ammo capacity.
  • Each shot inflicts three types of damage: direct impact, an explosive blast, and shrapnel.
  • The weapon’s bolt must be manually cycled between shots, making it one of the slowest-firing weapons in the game, aside from anti-tank weaponry.
  • With a five-round magazine and six spare magazines, Eruptor has a total of only 35 rounds. Every shot must count, making Secondary and Support Weapon choices crucial. The Siege-Ready passive can be beneficial, as it increases spare magazine capacity and improves reload speed.

• The jet-assisted rounds of Eruptor are highly versatile, capable of dealing both heavy single-target and area damage.
  • Tough enemies take damage from the projectile impact, explosion, and shrapnel. This combined damage can eliminate most medium-sized enemies in one or two shots, depending on shrapnel distribution and the target's explosion resistance.
    • Shrapnel makes the Eruptor especially useful against specific unarmored Illuminate targets, such as Fleshmobs and large energy shields like those used by Harvesters.
  • Groups of small enemies are highly vulnerable, as they are hit by both the explosion and shrapnel. This is especially effective against Terminids, allowing a single shot to wipe out a patrol of Pouncers and Bile Spitters. It also excels at clearing Bug Breaches and destroying the underside of a Dropship during a Bot Drop.
    • Note that a Dropship is fully covered in  Tank I armor, so they themselves cannot be damaged by Eruptor in any way.
  • A Gunship can be downed within two shots by targeting one of the engines.
  • The explosive power of Eruptor makes it effective against mission objectives. A single round can destroy a Bug Hole, simplifying the clearing of Bug Nests and Stalker Lairs. It can also eliminate Automaton Fabricators and Bulk Fabricators by hitting their exhaust vents and take down Broadcast Towers in one shot. Spore Spewers and Shrieker Nests require as few as three shots.
• By default, Eruptor comes with a 10x Sniper Scope.
  • Eruptor performs best at long ranges by sending its explosive rounds at targets that are unaware of the wielder's presence, acting as a grenade sniper. This is important both for keeping targets at arm's length, as well as before their pursuit and evasive movements scatters them such that fewer can be caught within the explosive and shrapnel radius.
  • Beware that Eruptor has one-second lifetime with maximum range of approximately 180 meters after which rounds will automatically explode. This prevents the weapon from sniping targets at extreme ranges but is generally not an issue since engaging targets at ranges greater than 40-50 meters already grants it a strong tactical advantage.
  • The scope is particularly useful for destroying enemy spawners from safety. Standing on the outer rim of a Bug Nest and shooting Bug Holes while circulating around the perimeter can clear it without ever stepping foot inside, while getting a clean angle on a Fabricator's front can destroy it without engaging any of the enemies within a Bot Outpost.
  • If you fire the R-36 Eruptor immediately after racking the bolt, the bullet will veer to the left. You can avoid this by switching to first-person shooting mode.
• Due to a combination of factors, Eruptor fares very poorly at close range.
  • Identically to the bolts of the CB-9 Exploding Crossbow, the bolts of the Eruptor will also "skip" alongside flat surfaces if the bolts are not making contact at a perpendicular angle, leading to the undershot bolts sliding past and exploding too far behind its intended targets.
  • Because of the explosion and shrapnel dealt at the point of impact, players can easily inflict enough damage to kill themselves by shooting at nearby targets. Care should also be taken when attempting to support teammates with Eruptor fire as the explosion and shrapnel can easily inflict friendly fire under the wrong circumstances.
    • A reliable Secondary Weapon or rapid-fire Support Weapon is recommended to deal with enemies at close range. Pistols like the P-113 Verdict can quickly dispatch individual targets, while machine guns like the MG-43 Machine Gun or M-105 Stalwart combine reliability with staying power.
    • A drone backpack like the AX/AR-23 "Guard Dog" or AX/LAS-5 "Guard Dog" Rover is also very useful, providing automatic overwatch and quickly killing most small enemies before they become a problem.
    • The ergonomics of Eruptor are notoriously poor as it possesses significant weapon drag. This makes it cumbersome to use when trying to quickly shift aim, which negatively impacts the wielder's ability to quickly acquire targets, especially at closer ranges.
      • The Peak Physique armor passive increases ergo by 30.
      • Utilizing Iron Sights and an Angled Foregrip can be very helpful in alleviating this characteristic of the weapon which increases ergo from 11 to 35.
  • The weapon's low rate of fire makes it very difficult to place successive rounds on target. Each shot should be deliberately placed for maximum effect, and it is difficult to make such judgment calls in the middle of a combat melee.
  • Tactical reloads are best done when only one round is left in the weapon. Due to the weapon's small combat load, every single shot is extremely valuable, so leaving rounds in the discarded magazine is very wasteful. Each shot has the potential to destroy an enemy spawner, or kill groups of enemies.

Media

• 

  Weapon Wheel
• 

  Aiming, Third-Person
• 

  Aiming, First-Person
• 

  Armory Icon

Change History

Patch

Description

1.003.000
2025-05-13

Changes

• Spread decreased from 10 to 5
• Ergonomics increased from -14 to 25
• Sway decreased from 1 to 0.8
• Fire rate increased from 25 to 32

Fix

• Fixed a bug that allowed players to cancel the Eruptor's round cycling animation, effectively increasing its fire rate

1.002.201
2025-03-25

Fix

• Fixed an issue where shrapnel from surface-hits was forced in a roughly south-west direction. Shrapnel should now properly fly out in a 180-ish arc in the direction of the surface hit

1.002.200
2025-03-18

Changes

• Projectile armor penetration increased from  Medium to  Heavy
• Projectile lifetime increased from 0.7 to 1 sec

1.001.201
2024-10-29

Undocumented Change

• Changed the Eruptor's firing SFX.

1.001.100
2024-09-17

Changes

• Re-introduced shrapnel.
  • Replaced the original shrapnel with the Frag Grenade shrapnel to no longer instantly one-shot Helldivers with the exception of the occasional unlucky headshot.
  • Also increased the amount of shrapnel.
• Shrapnel projectiles amount are set to 30.
• Shrapnel damage is set to 110.
• Explosion damage decreased from 340 to 225.
• Explosion radius increased by 33% (17% for inner radius and 50% for outer radius).
  • Inner Radius increased from 2m to 4m.
  • Outer Radius increased from 6m to 7m.
  • Shockwave Radius increased from 6.5m to 8m.

1.000.400
2024-06-13

Changes

• Increased total damage from 420 to 570 damage per shot.
  • Explosion damage increased from 190 to 340, projectile damage unchanged.

1.000.302
2024-05-07

Changes

• Increased explosion damage by 40 and removed shrapnel from the explosion.

Fix

• Fixed issues with some weapon scopes not being aligned in First-Person-View.

1.000.300
2024-04-29

Changes

• Slightly increased explosion damage falloff.
• Reduced maximum magazines from 12 to 6.

Fixes

• Explosive weapons no longer pull players inward from the blast.

1.000.202
2024-04-11
(Mid-Patch)

Addition

• Added to the game.

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Submachine Gun

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Explosive

R-36 Eruptor  •  CB-9 Exploding Crossbow

Energy-Based

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Special

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Secondaries

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Melee

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Special

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Throwables

Standard

G-6 Frag  •  G-10 Incendiary  •  G-7 Pineapple  •  TED-63 Dynamite  •  G-12 High Explosive

Special

G-16 Impact  •  G-23 Stun  •  G-3 Smoke  •  G-123 Thermite  •  G-13 Incendiary Impact  •  K-2 Throwing Knife  •  G-4 Gas  •  G-50 Seeker  •  G-142 Pyrotech  •  G-109 Urchin  •  G-31 Arc  •  TM-01 Lure Mine