|This article, BR-55 Squad Support Variant, was written by SheWhoKnows. Please do not edit this fiction without the writer's permission.|
In 2551, the UNSC commissioned the development of an external SOPMOD kit for the newly issued BR-55, codenamed BR(HC). The project evolved over time, and eventually became a modified stock and receiver kit. The main difference of the BR-55 Squad Support kit from the original was the addition of a thicker, polycarbonate butt stock and a front dual-stabilizer fin underneath the barrel. This could be turned upside-down to act as a bi-pod for the weapon. The receiver was also changed; a fire-control switch was added to allow the BR-55 to fire on fully automatic. The magazine slot was expanded to allow the weapon to accept belt-fed chains of .45 caliber ammunition. The main drawbacks to the weapon were the increased cost and general inefficiency of the firing mechanism. The BR-55 was not meant to fire in more than three-round burst, and during sustained fire the barrel would often overheat and jam. The UNSC attempted to fix these problems with the BR-55A1, but the damage had been done. The BR-55 Squad Support kit was discontinued in 2554.
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