This gundam paper model is a SD RX-121-2A Gundam TR-1 [Advanced Hazel], a mobile Suit from the Gundam Universal Century timeline, appearing in the Advance of Zeta: The Flag of Titans manga, the papercraft is created by 333bankin.
The RX-121-2A Gundam TR-1 [Advanced Hazel] is the remodeled RX-121-2 Gundam TR-1 Hazel II, with leg enhancement parts and a multi weapon latch installed to match its specifications to those of the RX-121-1 Gundam TR-1 Hazel Custom. A high-performance optical sensor unit like that of the RGM-79SR GM Sniper III has been added to its head, and supplemental thruster units to the soles of its feet. The movable booster pod on its enhancement backpack has also been replaced with a new type, tested on the RMS-117 Galbaldy β, which can be fitted with two shield boosters to increase its performance still further. The enhanced shield booster has ten diffuse beam guns installed on its surface, which increase the mobile suit's defensive capabilities by shooting down missiles and other projectile weapons. However, the shield booster's propellant capacity is reduced accordingly, giving it lower performance as a booster. All the test results of previous option parts were used in the creation of the Advanced Hazel, which could be considered the current "completed form" of the Hazel.
Testing of the new booster pod with two shield boosters was originally meant to be conducted with the RMS-117 Galbaldy β High Mobility Type. However, this Galbaldy β was lost when Lt Maxim Gunar defected to the AEUG. The tests were thus performed with the Hazel II, and their results are reflected in the Advanced Hazel. The new booster pod lacks the generator and thruster equipment of the previous version, and consists of little more than latches for the shield boosters and an optional propellant tank, acting as a multi-connector pod. Meanwhile, the sub arm unit was also adopted due to the good results of its testing with the Hazel Custom. [Source: wikia]
You can download this papercraft template here: SD RX-121-2A Gundam TR-1 [Advanced Hazel] Free Paper Model Download [Box] [Gavitex]