Battle rifle

There are three references of the following Battle Rifle in the Halo Universe:


 * Prototype BR-55 - Halo: Contact Harvest-Prototype Battle Rifle
 * Unidentified Battle Rifle Variant - Halo: Reach - era Battle Rifle
 * BR55 Battle Rifle - Halo 2-era Battle Rifle
 * BR55HB SR Battle Rifle - Halo 3-era Battle Rifle