he RX-121-2 Gundam TR-1 [Hazel Owsla] is a Mobile Suit from the Gundam Universal Century time-line. Appearing in the Advance of Zeta: The Flag of Titans.

The RX-121-2 Gundam TR-1 [Hazel Owsla] is a version of the RX-121-2A Gundam TR-1 [Advanced Hazel] equipped with the Primrose emergency escape pod. The Primrose was developed in order to increase the survival and recovery rates of the pilot and the mobile suit data without reducing the Hazel's performance, but because the Primrose replaces almost the entire chest and torso, this version is called the Hazel Owsla to distinguish it from the normal one. Since the Primrose was designed for high extensibility, the Hazel Owsla can support even more optional weapons and extra equipment functions, and can use various options to adapt to different combat situations.

Like the Primrose, the Hazel Owsla can be equipped with a wide variety of backpacks and optional weapons, including a sub arm unit, the optical sensor unit and leg enhancement parts of the RX-121-2A Gundam TR-1 [Advanced Hazel], the tri booster unit of the RX-121-2 Gundam TR-1 Hazel II, or the multi connector pod and shield boosters of the Advanced Hazel. Most configurations of the Hazel Owsla carry a long blade rifle, and this machine can also use the Primrose's mega particle cannons and missile pods as built-in weapons. Most Hazel Owsla configurations use the same compact shoulder armor as the RX-121-1 Gundam TR-1 Hazel Custom w/Sniper Unit.