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Terminal.png This article, M55C Enhanced Battle Rifle, was written by Ajax 013. Please do not edit this fiction without the writer's permission.

M55C Battle Rifle.png
Production information

Misriah Armoury


Battle Rifle

Technical specifications
  • Weight
    • 3.8 kilograms (unloaded)
    • 4.2 kilograms (loaded)
  • Length
    • Overall: 1040mm
    • Barrel Length: 26 Inches
Magazine Size

15/36/60 round magazines

Fire Mode
  • Semi-Automatic
  • Automatic
  • Burst
Ammunition Type

9.5x40mm Kurz


Short stroke gas operated rotating bolt

Rate of Fire

750-900 rounds per minute


790 metres (1100 with scope)


1530 metres




The M55C Enhanced Battle Rifle is, along with the MA6A Individual Combat Weapon System one of the two main small arms issued to UNSC ground troops. The weapon has undergone several major and minor changes from the BR85, its ancestor, but remains outwardly similar. The weapon is made from dense polymer shell with optional Titanium allow optics rail and receiver, and a milled steel/chrome, cold hammer forged barrel. The computer suite has now been heavily expanded, now capable of interlinking with attachments to the gun along with its older tasks of ammo counting and objective pointing. The weapon is also lighter than previous models, increasing its usefulness in the field, particularly among weight-pinched ODSTs and special operations forces. The M55C is fitted with a receiver mounted Misriah rail and a rail either side of the rifle.


The M55C EBR is the complementary firearm to the MA6A, making it a go-between a sniper rifle and an assault rifle. Lighter and easier to handle than a Designated Marksman Rifle, and harder hitting and more accurate than an assault rifle. Their portability and range allowed fireteams to significantly increase their range of engagement, without reducing their mobility. The M55C is preferred by the UNSC Marine Corp and Navy due to its more compact overall size.


The M55C with a grenade launcher and sling in the hands of a UNSC Serviceman

The M55C EBR is a selective fire, air-cooled magazine-fed rifle with a gas-actuated piston operating system and a rotary bolt locking mechanism. The EBR fires from a closed bolt, which when fired, the bolt travels down the receiver rather than backwards to absorb recoil and direct it away from the shooter and has a hammer-type firing mechanism. A fire mode selector is provided which also serves as a manual safety catch. It shares the majority of its internal components with the MA6A, making it relatively simple and rugged. The can take a variety of specially built furniture to provide a choice of fore-grips or a rail interface to provide a Misriah rail underneath the rifle for grenade launchers or vertical fore-grip. By standard, Marine units are issued with Misriah produced furniture and Army units with Armalite produced furniture, while both branches have facility for issuing rail interface systems. The EBR features a heavy barrel, with a 1:7 twist. This barrel is manufactured from composite materials, with chrome lining, reducing spoiling and increasing its service life. The Barrel is entirely free floating, allowing it to reduce potential penalties to accuracy.


The M55C EBR, marketed by Misriah's Armalite brand as the Battle Rifle 09, being sold as in both fully automatic, non-modified military spec weapons (with extensive security and background checks, making it exceedingly rare) and the more plentiful M55CV, which includes a fixed stock, semi-automatic only capability and fixed barrel length, with only 15 round magazines sold with it.

The M113 Special Purpose Rifle is an accurized variant produced for the UNSCDF as a light sniper rifle. The M113 SPR carries 74% commonality with the EBR.


  • More accurate and longer ranged than an assault rifle or a submachine gun.
  • More compact and lighter than the heavier M396.
  • Offers a higher rate of fire, lighter weight, and larger ammunition capacity than a sniper rifle.
  • Ability to mount most UNSC weapons attachments.
  • Modernized ammunition types give it increased accuracy.


  • Difficult to clean in the field.
  • Less accurate than a sniper rifle or the M396 Designated Marksman Rifle.
  • Full automatic fire is difficult to control due to the weapon's layout.

UNSC Comments

"The rifle is a bastard to clean, that's my only gripe. At least you can field strip the thing without lugging around this massive factory-issue field kit."

"Its been completely screwed over by increased capabilities of the MA6A and the HBR11. Its just good as a assault rifle now..."

"Those Misriah Rails help alot. Means you can modify it for any mission with stuff like night scopes, laser targetters, flash lights, anythin'."

"I'd carry the M396, but those things are just to big to fit inside a drop pod and still carry ammo, not to mention the fact that the M55C's weight allows you to actually use it."

Individual and Crew Served Weaponry of the UNSCDF


M6L Personal Defence Weapon System | M57 Pistol | M98 Compact | M19 Modular Pistol

Submachine Guns

M20A Submachine Gun | M12 Special Operations Carbine | M8Z Submachine Gun

Assault Rifles, Carbines, and Battle Rifles

MA6A Individual Combat Weapon System | M2A Carbine | M81 Special Purpose Carbine | M55C Enhanced Battle Rifle

Designated Marksman Rifles

M396 Designated Marksman Rifle | M97 Special Purpose Rifle | M113 Special Purpose Rifle

Machine Guns

M397 Individual Automatic Rifle | M739C Squad Automatic Weapon | M122 Light Machine Gun | M247B2 General Purpose Machine Gun | M247H2 Heavy Machine Gun | AIE-486K1 Heavy Machine Gun | M343A3 Heavy Machine Gun | M780 Special Purpose Machine Gun

Sniper Rifles

M22 Scout Rifle System | M818D Enhanced Modular Sniper Rifle System | M1091 Sniper Rifle System | Sniper Rifle System 99G-S6 Anti-Materiel | M99CA1 Special Application Scoped Rifle | M133 Precision Anti-Materiel Energy Weapon System


M45F Close Assault Weapon System | M108A1 Close Assault Weapon System | M77 Extreme Close Quarters Combat System

Energy Weapons

Weapon/Anti-Vehicle Model 6B Grindell/Galilean Nonlinear Rifle | MX4 Light Support Weapon | M921 ARC

Non-Lethal Weapon

M2 Threat-Negation Device | MX9 Pulsed Energy Projectile System | M39 Long Range Tranquillizer Rifle

Missile and Rocket Launchers

M41B2 Medium Anti-Vehicle/Assault Weapon | M899 Light Anti Armour Weapon | M57 Light Multipurpose Assault Weapon | M1 Multiple Launch Rocket System | M25 Underslung Rocket Launcher

Grenade Launchers

M319N Individual Grenade Launcher | M23 Multiple Grenade Launcher | M363B RPD | M460C Automatic Grenade Launcher | M556 Counter Defilade Grenade Launcher | M24 Underslung Grenade Launcher | M26 Grenade Launcher Module


M71 Mortar | M78 Mortar | M81 Mortar


M117 Light-Weight Field Howitzer

Sentry Guns

M55 GUARD DOG Sentry Gun | M601 GARGOYLE Sentry Gun


M9 Dual Purpose/High Explosive Grenade | M2 Anti-Materiel Grenade | M70 Flash Bang Grenade | M43 Smoke Grenade

Anti-Personnel and Anti-Armour Mines

M320 Anti-Tank Mine | M341 Anti-Tank Mine | M362 Anti-Tank Mine | M121 Bounding Anti-Personnel Mine | M127 Anti-Personnel Mine

Explosive Devices

C-7 Foaming Explosive | C-13 Gertex | C-14 Plastic Explosive | C-15 Liquid Explosive | M303 Thermite Cord | M311 Detonation Cord | M382 Special Munition Attack Charge (Kinetic) | M390 Breaching Charge | M394 Clearance Charge | M404 Special Lightweight Attack Munition | M366 Demolition Charge | M376 Satchel Charge | M379 Explosive Pack