5mm round (Fallout: New Vegas)

The **5mm round** is a type of ammunition in *Fallout: New Vegas*.

## Background

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A high velocity round designed for assault rifles, the intermediate 5mm M134 cartridge has been replaced by the more powerful 5.56mm round in assault rifles. However, it found a new life as linked, belt fed ammunition for man-portable miniguns on the battlefield, specifically the M134 cartridge and 7.62x51 millimeter rounds. It has also been retained as the ammunition of choice for paratrooper assault carbines, due to its light weight and portability.

## Characteristics

5mm is traditionally belt-fed, and is available in rather high quantities, something made necessary by the notably large "magazine" sizes on the weapons that use it. For example, the minigun loads 240 rounds at one time and fires an exceptional rate, requiring that the player carries a huge supply if they intend to rely on miniguns. As of patch 1.3.0.452 standard and surplus 5mm rounds have a -10 DT effect making them excellent for use against moderately armored targets such as NCR troopers and Legonaries.

### Weapons using this ammunition

* Assault carbine
* CZ57 Avenger
* Assault carbine (GRA) Gun Runners' Arsenal
* Minigun

## Variants

### 5mm, armor piercing

Armor-piercing rounds are designed for punching through armor plating, so they have a strengthened case with a specially hardened and shaped nose. Due to the high muzzle velocity and penetrating properties of the round, damage to the target is slightly reduced. They are more common and can be purchased in larger numbers than any other type of AP rounds in game. As of patch 1.3.0.452 they now have an armor piercing effect of -25 DT, by far the largest armor piercing effect of any ammunition found in the game, capable of penetrating high-DT armors such as T-51b power armor.

### 5mm, hollow point

Hollow point bullets mushroom out upon impact, tearing through fabric, flesh and organs creating a larger wound cavity. However, hollow points lack the penetrating power to punch through denser materials, this means they cannot pierce things like armor plate, drastically reducing the weapon's penetrating power. 5mm HP rounds are very rare in the Mojave, sold in very small amounts by some vendors. They are however less susceptible to armor than most hollow points with only a x2 DT multiplier as opposed to x3 but this is balanced by the fact that all 5mm weapons have a low DAM output.

### 5mm, surplus

Surplus ammunition is of poor quality, but is available in large quantities. The rounds are slightly more damaging than standard 5mm but at the cost of more regular firearm maintenance, due to the cheaper materials used in their construction.

### 5mm, JSP (GRA)

A sub-type added in the add-on *Gun Runners' Arsenal*, jacketed soft points retain all of the armor piercing power of the 5mm round, while also being more powerful than the standard 5mm. The trade-off is that it degrades the weapon faster.

Crafting

### 5mm round (Junk)

Junk rounds are makeshift bullets made from materials commonly found while scavenging, such as scrap metal and tin cans. Junk rounds are the only good as a last resort ammo as firing them causes extra wear on the firearm and all around do less damage.

Crafting

## Locations

Vendors
* Gun Runners: Vendortron
* Camp McCarran: Sgt. Daniel Contreras sells in bulk (up to 8,000 rounds of all types)
* Novac: Cliff Briscoe.

## Bugs

* PC PlayStation 3 Xbox 360 Old World Blues With *Old World Blues* installed, the amount of 5mm rounds found in containers and other sources of loot is reduced dramatically, to roughly 30% of what is normally found. This change only affects containers found in the Mojave Wasteland, and not those located in Big MT.

## References

1. ↑ Ammunition package in *Fallout 3* and *Fallout: New Vegas* states the following: "*5mm LINKED M134*
*1 TRACER M17 4 API M8*
*FUNC LOT POD80h003L041*"
2. ↑ PRO ITEM.MSG: "*{2300}{}{Assault Rifle}*
*{2301}{}{An AK-112 5mm Assault Rifle. An old military model, out of use around the time of the war. Can fire single-shot or burst, using the high velocity 5mm rounds. Min ST: 5.}*"
3. ↑ Ammunition package in *Fallout 4* and *Fallout 76* states the following: "*Cartridges
"5"MM, Mil
7.62 x 51 MM ACT
(A165)
FUNC
(ST. A.CL.) 13S455*"
4. ↑ Weapon appearance.