Released as retrofit upgrade packages for the GM Desert Type mobilesuit, the Longrifle and Hawkeye loadouts are rarely seen on the battlefield. Designed to engage enemies at ranges unheard of to all but naval warships, the Longrifle Custom is equipped with a gigantic SMART-class railgun. When paired with the Hawkeye Custom's specialized long-distance communications uplink and tracking radar suite, the Longrifle can engage and destroy targets with pinpoint accuracy at incredible ranges.
Both suits come equipped with the standard three-tube launcher mounted on the leg, a heavy assault rifle, and a shield..
Due to the extreme size and power of the SMART-class railgun, the Longrifle custom must deploy specially-designed retractable bracers before firing. While deployed, the Longrifle must remain stationary, almost completely dependent upon the Hawkeye for local defense. This awkwardly symbiotic relationship between the mobile suits requires that both pilots work together as a fluid team in order to be effective.