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The 5.56mm round is a type of ammunition in Fallout: New Vegas.


The 5.56mm round, a high-velocity small-caliber rifle cartridge, is a general-purpose round for all guns, spanning the entire game's arsenal, from the early varmint rifle to the light machine gun. 5.56mm is common, light, cheap, easy to make, and is considered one of two "small rifle" cartridges, the other being 5mm.


Standard and match hand load 5.56mm rounds can be crafted at a reloading bench. A single cartridge requires the following materials:

Lead (12)
Repair: 25
5.56mm round (1)
Lead (14)
Repair: 50
5.56mm, match (hand load) (1)


Breaking down a standard 5.56mm round yields:

5.56mm round (1)
Repair: 25
Lead (10)

Weapons using this ammunition[]

Weapons using this ammunition:
Base weapon Variant(s)
5.56mm pistol Gun Runners' Arsenal That Gun
Light machine gun Bozar Gun Runners' Arsenal
Marksman carbine All-American
Service rifle
Varmint rifle Ratslayer


5.56mm, armor piercing[]

Armor-piercing rounds are designed for punching through armor plating. For this purpose, they have a greatly strengthened case with a specially hardened and shaped nose. Due to the high muzzle velocity and penetrative properties of the round, damage to the target is slightly reduced.

5.56mm, hollow point[]

Hollowpoint bullets mushroom and break upon impact, causing massive trauma on fleshy, un-armored targets. However, this also means they break up when they hit things like armor plates, drastically reducing the weapon's penetrating power.

5.56mm, surplus[]

Surplus ammunition is poor-grade ammunition made in large quantities by using corrosive materials in their construction. The resulting product is a slightly more damaging round at the cost of more regular maintenance on a firearm due to the damaging corrosive materials used in the round's construction. This ammunition is usually much cheaper than regular ammunition and comes in bulk packaging.

5.56mm, match (hand load)[]

Introduced with the Gun Runners' Arsenal add-on, match ammunition is precision-made so that every bullet has the same powder, shape, and weight. Match ammunition is often used in tournaments, sight alignment, and sniping. This ammunition type is given a slight damage boost and a significant reduction in the weapons spread. It requires the Hand Loader perk to craft.

.223 round[]

A common commercial hunting round designed for civilian use, most commonly used in hunting small to mid-sized game. This ammunition does less damage, due to lower internal pressure, resulting in less stopping power. These rounds tend to put less stress on the chamber, resulting in better weapon durability. .223 ammunition can be bought in bulk from vendors. Prior to patch, these rounds had a -8 DT effect.


Ammunition type- Ammunition TypeWeapons spreadWeapons spread modifier
Damage Modifier- Weapon Damage modifierBonus effectAmmo bonus effect
Damage Threshold modifier- Target Damage Threshold modifierCraftable- Ammo is craftable
Condition penalty- Weapon condition modifierPercentage chance of empty casing- Percentage change of empty casing, hull or drained cell/pack/tank
Ammunition typeDamage modifierDamage Threshold modifierCondition penaltySpread modifierCraftablePercentage chance of empty casing
5.56mm round, standardx 1x 1x 1x 1Yes35% chance
.223 roundx 0.9x 1x 0.8x 1No0% chance
5.56mm round, armor piercingx 0.95- 15x 1x 1No35% chance
5.56mm round, surplusx 1.15x 1x 3x 1No15% chance
5.56mm round, match (hand load) Gun Runners' Arsenalx 1.15x 1x 1x 0.65Yes35% chance
5.56mm round, hollow pointx 1.75x 3x 1x 1No35% chance



The world model for 5.56mm rounds is borrowed from Fallout 3 and is identical to the magazine of a Chinese assault rifle, though the weapon itself is not available in New Vegas.