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BR55CW SA Battle Rifle
Production information



Battle Rifle

Technical specifications

Handheld, Two-Handed

  • length: 90 cm
  • Weight: 8.378 lbs
Damage Per Hit
  • Medium Against Shielded Enemies
  • Low-Medium Against Flesh (Excluding Headshots)
  • Overall Damage: Medium
Magazine Size


Maximum Ammunition


Fire Mode

3 Round Burst, Fully Automatic

Ammunition Type

9.5x40mm M634 Experimental High-Powered Semi-Armor-Piercing/.374 Caliber rounds


Short-Stroke Gas-Operated Rotating-Bolt

Rate of Fire

Average, 2.4 Bursts per Second, 900 rounds per minute






Human Covenant War


BR55HB SR Battle Rifle


UNSC, Commandos


The BR55CW SA Battle Rifle, or the BR55 Commando Weapon Suppressor Attached Battle Rifle, is a weapon manufactured by the United Nations Space Command for spec ops personnel in the field, and is the successor of the BR55-SS Battle Rifle.

Physical Description

The BR55 is a bullpup, fully automatic, UNSC rifle that fires the 9.5x40mm X-HP-SAP round. It fires from a 36 round magazine which fits flush in the receiver. The receiver is built directly into the underside of the butt of the gun and is located behind the grip (known as a bullpup configuration).

This titanium alloy weapon is gas-operated with a rotating bolt and therefore must be cocked before the first round can be fired. The charging handle used to chamber the round is located on the left side of the weapon and does not move during operation. Once the first round is fired, the gases from that round and those to follow impinge upon a gas piston, which pushes back the bolt carrier, rotating the bolt inside and continuing to chamber rounds until the magazine is empty. Once the magazine is empty, the charging handle can either be pulled back and locked or, it can be fully cycled after a fresh mag has been housed. If it is pulled back and locked, then it must be pushed forward once a fresh magazine is housed to chamber a new round. The magazine release button is located on both sides of the gun with an arrow pointing down towards the housed mag in the stock. The ejection port is located on the right side of the weapon. There is also a fire selector on both sides of the ammo display.

The BR55CW SA, unlike the other BR55 models, lacks the optical scope, and instead has a plain carrying handle. In addition, it's barrel is prolonged by a silencer, which is fixed on the end of the barrel to silence the weapon. It features ablative baffles, texture buffers, and ablative stealth coating to ensure that it is undetectable on radar and other scanning systems.


After the early successes of the BR55X Battle Rifle, the testing model, the BR55 Battle Rifle was produced. However, this was only a temporary model. ONI Section III planned to create numerous variants, and also replace the standard BR55 with the BR55HB SR. Several new designs were thought up, and the BR55CW SA was among these. It was created to fill the medium range niche in the spec ops forces, and was the successor of the BR55-SS Battle Rifle, another silenced BR55 model.

The main goal of the BR55CW SA was to make a weapon that Spec Ops personnel could use in the field to exchange fire at medium range without compromising stealth. To accomplish this goal, the standard BR55 was affixed with a silencer, and an optical scope. Unfortunately, during testing, the scope revealed the shooters position quite often, and it was taken off to allow for higher stealth.

Changes from standard BR55

  • Lighter Weight
  • Stealth Coatings
  • Fully Automatic
  • Built In Suppressor
  • No Optical Scope

Field Usage

The BR55CW SA has seen widespread usage among commando and spec ops forces who rely on stealth for survival. Though it has not been implemented into mainstream infantry hands, it is still widely fielded among spec ops types. The BR55CW SA Battle Rifle has seen action in a variety of missions, and reports from the field are generally positive. The BR55CW SA was used primarily in the years following the Human Covenant War, against rebels.


The BR55CW SA, while a good weapon, is like any other firearm, imperfect. It had a few flaws, though none that absolutely killed the weapon. One flaw was the lack of an optical scope, which made aiming difficult at longer ranges. Another flaw was that, due to the silencer, range and accuracy were cut down, making the weapon less able to compete at longer ranges.


"The lack of the scope is, well disappointing, to say the least. Aiming with the old fashioned iron sights at longer ranges is nearly impossible, which is why a significant chunk of the special ops forces who use the weapon attach reflex sights to it to give them some measure of accuracy."

"While it's range is not as high as the bee are fifty five ach bee ess are (BR55HB SR), the bee are fifty five see double u ess eh (BR55CW SA) excels in it's role within the special forces. It is fully automatic, and can exchange fire at up to medium range accurately, something other weapons can't do."

"Got to make sure to remember to hold onto your gun, if you drop it, you could lose the thing. The stealth coatings and radar baffles work incredibly well, making it radar invisible and nearly impossible to be seen during the night by the naked eye."

"I've seen squadrons of spec ops troops infiltrate a building complex with these, strobe lights flashing and low whooshing sounds issuing from the barrels. Rebels dropping like mad, bullet holes covering walls in moments from automatic fire, crazy good stuff."

"The bee are fifty five see double u ess eh (BR55CW SA) will never be a mainstream weapon, as it wasn't designed for it. However, it has seen widespread usage in the field it was created for; spec ops missions where stealth is essential to survival."