Ammo

For a full list of Ammo items, see Category:Ammo.

Bullets

Firearm ammunition in Underrail comes in the following calibers: 5mm, 7.62mm, 8.6mm, 9mm, .44in and 12.7mm. They are all packed into a universal cartridge that any weapon class can use if the weapon is of that caliber. When crafting firearms, one of the components is the barrel which will dictate the caliber of the weapon. Not all weapon classes and models can use all calibers.

Three different types of ammunition are available for all calibers - Standard, expanding JHP and armor-piercing W2C rounds. Additionally, each caliber has its own craftable special round type. The value of different rounds can give a rough idea of their relative rarity and power.

You can mix and match different rounds of the same caliber into a single magazine using the Load Single Bullet options, allowing for additional tactical options and full reloads when less than one magazine worth of a single ammo type is available.

Quick reload commands for standard Shift + Q, W2C Shift + W, JHP Shift + E and special Shift + R rounds are also available.

Standard Rounds

Standard round.

The cheapest and by far the most common variety. Has no drawbacks nor special strengths.

JHP Rounds

Jacketed hollow point round. Incurs 150% of mechanical damage resistance and threshold, but the damage that penetrates the armor is increased by 40% against organic targets.

Rarer and more expensive than standard rounds, JHP rounds are best used against soft, unarmored targets to cause extra damage.

W₂C Rounds

Armor-piercing cartridge with a tungsten carbide bullet. Ignores 30-45% of target's mechanical damage resistance, depending on the caliber, and 65% of damage threshold.

Rarer and more expensive than standard rounds, W₂C rounds are best used against heavily armored or mechanical targets, such as auto-turrets and wheeled bots.

Special Rounds

In addition to the universal Standard, JHP and W₂C rounds, each caliber has a unique special round type. These can be acquired by reloading your spent casings with appropriate blueprints. There is a 30% chance to gain spent casing whenever firing a firearm.

5mm Shock Round 7.62mm Micro-Shrapnel Round 8.6mm Incendiary Round

9mm Acid Round .44 Explosive Round 12.7mm Contaminated Round

Weight and value

Notably, 9mm JHP rounds are relatively cheap.

		Value
Caliber	Weight	Std	JHP	W2C
5mm	0,02	10	20	20
7.62mm	0,03	14	20	24
8.6mm	0,03	20	26	30
9mm	0,04	26	18	36
.44	0,06	45	52	60
12.7mm	0,06	80	90	110

Shells  ^Expedition

Exclusive to Underrail: Expedition, shotgun shells are all 12 gauge shells with a variable pellet count which is denoted in their name ranging from 3 pellets to 20.

Each pellet rolls its own attack roll, damage roll, and crit roll individually and can potentially hit bystanders if the initial target is missed. Lower pellet count shells have more damage per pellet and have armor piercing while high pellet count shells are suited for unarmored targets.

Name	Damage/Pellet	Total Damage	DT Reduction	DR Reduction
20p Shotgun Shell	6%	120%	40%	0%
12p Shotgun Shell	9%	108%	55%	0%
6p Shotgun Shell	15%	90%	70%	30%
3p Tungsten Shotgun Shell	25%	75%	80%	50%

Launcher Grenades  ^{Heavy Duty}

Exclusive to Underrail: Heavy Duty, launcher grenades are used in grenade launchers, and come in two calibers: 25mm and 40mm depending on the weapon frame.

25mm grenades have an explosion radius of 1, while 40mm grenades have an explosion radius of 2. Both 25mm and 40mm have fragmentation and high explosive grenades available. Additionally each caliber has two specialty grenade types: incendiary and concussive for 25mm, and cluster and thermobaric for 40mm.

Frag Grenades

25mm Frag Grenade
40mm Frag Grenade
Fragmentation launcher grenades deal their damage primarily through shrapnel which is suited for unarmored targets. More shrapnel is likely to hit near the center.

HE Grenades

25mm High-Explosive Grenade
40mm High-Explosive Grenade
High explosive launcher grenades are effective and dedicated anti-armor explosives that are still functional against unarmored foes if needed.

25mm Specialty Grenades

25mm Concussive Grenade
Concussive launcher grenades deal low mechanical damage, but always daze injured foes, and have a small chance to stun targets who are already dazed.

25mm Incendiary Grenade
Incendiary launcher grenades deal low initial heat damage, however it can set targets on fire (which can cause fear), sets the ground abaze, and has increased radius for a 25mm round.

40mm Specialty Grenades

40mm Cluster Grenade
Cluster launcher grenades initially explode in a small radius for minimal damage, however afterwards 8 additional bombs are released in a massive radius that each then create another small explosion.

40mm Thermobaric Grenade
Thermobaric launcher grenades explode in an even larger radius than standard 40mm grenades, deal increased heat damage, and penetrate damage resistance and threshold.

Bolts

Bolts are the standard crossbow ammunition. They have no need to be loaded individually, so long as the character has spare bolts they are loaded with each shot.

Special Bolts

Crossbows also have a wide variety of special bolts available, which are equipped as utilities and launched with the current crossbow for 4 more AP than its regular attack.

• Broadhead Bolt ^E
• Serrated Bolt
• Acid Bolt
• Rusting Acid Bolt ^E
• Corrosive Acid Bolt
• Black Dragon Poison Bolt
• Cave Ear Poison Bolt
• Crawler Poison Bolt
• Burrower Poison Bolt
• Blinding Poison Bolt ^E
• Leper Poison Bolt ^E
• Heartbreak Poison Bolt ^E
• Tranquilizing Bolt
• Incendiary Bolt ( Mk II, Mk III)
• Shock Bolt ( Mk II, Mk III)
• Spirit Poison Bolt
• Putrefying Bolt
• Void Bolt ^E

Batteries

Batteries can be used to recharge various items and equipment. Notably energy weapons such as laser, plasma, and electroshock pistols rely on batteries to regain energy. Instead of utilizing a variety of specialty ammunition these weapons instead benefit from higher quality batteries that can restore more energy per use.

Name	Energy	Weight	Value
Supercharged Lithium Cell	30	0.10	100
Fusion Cell	100	0.10	300
Plasma Cell	200	0.10	600
Greater Fusion Cell	500	1.5	1200

Chemical ammunition

Chemical weapons use special vials filled with chemicals as their ammunition. They come in acidic, cryogel, and incendiary varieties.

Acid Vials

Acid Vial
Corrosive Acid Vial
Rusting Acid Vial ^E
Usable by acid blob pistols, they entangle targets and deal Acid damage. Corrosive ammunition lowers enemy damage resistance and threshold, while rusting deals more damage to machines.

Cryogel Vials

Cryogel Vial
Usable by cryoliquid blob pistols, it freezes and chills targets while dealing Cold damage.

Incendiary Vials

Incendiary Vial
Usable by incendiary blob pistols, it sets targets on fire and deals Heat damage.