The AR-548 is a powerful, long ranged, electromagnetically accelerated railgun rifle. The improved Scimitar would serve the USIF well in later campaigns, particularly in its battles against the ruthless Orion's Spear. Shortly after the USIF victory over the Arm in the Outer Rim War, an improved model of the Scimitar was issued to its soldiers. They reverse-engineered the AR-546 to create their own version, known as the REC-74 War Dragon, thus starting the Arm's reverse-engineering of USIF weapons. The rebel army Arm of Orion found the weapon to be so effective that they eventually stole several models of the AR-548's older version, the AR-546. The weapon proved extremely lethal and has since received system upgrades to link the weapon statistics with the soldier's HUD, such as ammunition count, available attachments, accuracy, and bore temperature. It is assumed to have entered service near the time the USIF Powered Assault Armor began to come into use, since the weapon is far too powerful for standard infantry to handle. The AR-548 is the earliest known model of the Scimitar weapon line.
