MA2B Carbine

This fanfiction article, MA2B Carbine, was written by Sev40. Please do not edit this fiction without the writer's permission.

This article, MA2B Carbine, was written by Sev40, but may be used freely by other users even without the author's explicit permission.

This is a fanon expansion of a canon element. To see the original canon article, follow the link to Halopedia: MA2B assault rifle.

MA2B Carbine
Place of origin:	Mars
Type:	Bullpup carbine
Service history
In service:	2319 - present
Used by:	UNSC
Production history
Designer:	Knut Danielsen
Manufacturer:	Misriah Armoury
Specifications
Weight:	Empty: 2.1 kilograms Loaded: 2.9 kilograms
Cartridge:	9.9mm (.390) fin-stabilised subsonic rounds
Operation:	Short-stroke, gas-operated, rotating-bolt
Rate of fire:	~900 RPM
Effective range:	450 metres (1,476 ft) maximum
Feed system:	32-round magazine
[Source]

"Sure, no other subsonic round performs quite like the Nine point Nine, but whoever designed a fully-automatic rifle for it should be fired."

―Anonymous Orbital Drop Shock Trooper

The MA2B Individual Combat Weapon System (MA2B ICWS) is an older model of carbine built for the UNSC Marine Corps and Navy. A rare and obscure weapon even within the UNSC's Special Forces, the MA2B is designed to provide superior subsonic capabilities without the bulk exhibited by other rifles at the time. It is short and light, with three P/N 16309 attachment rails to allow it to be rapidly-reconfigured to mission needs. Unlike its close relatives, the MA2B is chambered with the unique M94 9.9mm cartridge rather than the more common M118 7.62mm round, which gives it improved stopping power, range, and accuracy when compared to other firearms issued for covert operations.

Development

The MA5B Carbine was an old weapon, and it was developed according to the needs of Project ORION in the early Twenty-Fourth Century. Riding high on promising results of animal testing, the Colonial Military Administration's research and development division and the Office of Naval Intelligence began to experiment on the concept of augmented supersoldiers. As the program progressed and predictions became more and more optimistic, the CMA saw an opportunity to upgrade their arsenal to include larger-calibre rifles, as they believed that the final operatives could easily withstand the abuse that such a weapon would have. As they already had a new service rifle being designed for their troops, the organisation issued a contract for a subsonic carbine to Misriah Armoury in 2318.

Misriah immediately set to work on designing and testing a new range of larger rounds, with each being assessed based on their power, accuracy, weight, and stealth qualities. To assist with the task, the company worked closely with personnel involved in Project ORION, including potential test subjects. Their feedback informed Misriah that their 9.9x65mm cartridge was the most popular, although complaints with its recoil caused them to reduce it to the M94's final length of 46mm.

With the ammunition now finalised, Misriah now began to adapt the design of the new MA2-series assault rifle to fit it. The first resulting prototype, the XMC2-1 designed by martian-born engineer Knut Danielsen, was formally presented to the CMA procurement officers in 2323. While its built-in suppression system and round performance was impressive, they were thoroughly disappointed with its low rate-of-fire, which was a compromise to allow it to have a near-negligible kick. They requested that this was brought up to par with that of their existing assault rifles, a longer barrel to increase accuracy, and an electronic suite be added so that it could interface with ORION's Advanced Combat Helmet currently under trials. While the latter two were incorporated easily, the former undid their hard work at making it useable by unaugmented soldiers, as fully-automatic fire made it completely uncontrollable. Despite their efforts, these problems persisted into the final rifle that entered service in 2325, mitigated only by a burst-fire option built into the selector switch.

Service history

Specifications

Ammunition

The MA2B carbine was the only rifle designed to use the M94 9.9x46mm cartridge. Larger but somewhat shorter than the 7.62mm ammunition typically used in the modern MA5-series assault rifles, the M94 is specifically engineered for use in covert operations within atmospheric environments, without sacrificing the ballistic performance of conventional rounds. To achieve this, it is fin-stabilised to increase range and had a rather heavy tip to defeat any body armour available at the time. Even without the advanced sound-suppression systems found in the MA2B, the M94 is noted as being remarkably quiet, which is why it has also been used in a number of suppressed pistol models.

The M94 was eventually superseded by the improved M95 Special covert cartridge. Introduced in 2495 to serve the second generation of ORIONs, this round is noticeably longer at 54mm to accommodate a larger volume of flashless chemothermal powder. This is paired with a small microcomputer circuit, which controls when the powder is ignited to maintain the bullet's velocity and heading over longer distances. This also means that the round itself can be made 32% heavier without any extra drop or loss of range to improve penetration against armour. The M95 Special was initially too costly to be manufactured en masse, and for a time its production was suspended on these grounds. When the Human-Covenant War arrived, these issues were resolved and it would fully replace the old M94 stock.

Advantages

In the realm of covert combat, the MA2B strikes a perfect balance between firepower and stealth. The large caliber and high rate of fire ensures that an operator can easily defend themselves in a crowded situation. The integrated sound-suppression system makes it among the most quietest rifles in the UNSC's inventory, with only suppressed pistols proving to be even quieter. It is also remarkably resistant to malfunction, able to operate after being submerged in mud and water conditions that would jam other firearms.

Disadvantages