• Beam Rifle
• Beam Saber
• Titans-Colored Shield
• Shield Booster

After Lt. Wes Murphy's Gundam TR-1 [Hazel] was heavily damaged in combat with Zeon remnants, it was repaired and upgraded using parts from an RGM-79Q GM Quel and spare Hazel parts. The upgraded version, named "Hazel Custom," incorporates combat data and development knowledge from the original Hazel, resulting in a more balanced and complete mobile suit.

• Enhanced Parts: Better integrated with the internal structure for a unified appearance and improved performance.
• Increased Performance: Lighter weight and increased thruster output provide roughly 10% greater acceleration.
• Experimental Cockpit: Equipped with a 360-degree panoramic monitor and linear seat system, along with an upgraded operating system.
• Model Number: Changed from RX-121 to RX-121-1.
• Shield: Uses a standard shield instead of the unique shield boosters, which were lost in previous battles, temporarily reducing mobility.
• Armor: Remains mostly grey due to time constraints preventing a repaint in Titans colors.

• Basic Specs: Similar to those of the GM Quel, including generator and thruster performance.
• Leg Sections: House thermonuclear rocket engines with an output of 17,500 kg each.
• Backpack: Equipped with a movable booster pod and a thermonuclear reactor serving as a supplemental generator and hybrid jet/rocket engine with an output of 390 kW and 18,000 kg.
• Support Actuator Units: Retained from the original Hazel, allowing for the same equipment and enhancement parts.
• Weapon Latch: Located on the center skirt armor and above the cockpit hatch for flexible weapon options.

• High Mobility Form: Identical to the original Hazel.
• Assault Form: Equipped with the booster pod from the RMS-117 Galbaldy β High Mobility Type, two shield boosters, and the extendable shield from the Galbaldy β.

The Hazel Custom offers significant performance improvements and advanced capabilities, making it a formidable mobile suit in combat.