BR55HB battle rifle (Earth-7149)

The BR55 Heavy Barrel Service Rifle (BR55HB SR) is a select-fire rifle manufactured by the Armat Battlefield Systems used by the UNSC and private exploratory teams.

Design details
The BR55HB Service Rifle is a gas-operated, magazine-fed, mid-to-long range weapon capable of semi-automatic and burst-firing modes. The BR55, having a rifled barrel, is 89.9cm long and is fitted with a scope for increased accuracy. The scope is mounted on the optics rail. The safety is also located above the handle of the weapon. The weapon fires the M634 X-HP-SAP round from a 36-round magazine. Additionally, the weapon features a scope attachment capable of 2× magnification. In addition to its initial role, the BR55 battle rifle can also fulfill the role of a designated marksman rifle.

Trivia

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