It warmed my heart when Bandai started releasing figures of variations and from various side stories of the gundam universe. Hazel in particular is from Advance of Zeta: The Flag of Titans and was the test unit that was later developed into the iconic Gundam Mk.II.
Hazel resembled its base, GM Quell/GM Custom (from 0080 War in Pocket) and sported experimental beam rifles with stacked magazines, which was a brand new technology at the time. The 3 massive thrusters doubled as shield per depletion of the fuel and though they added incredible speed to the unit, their weight often crippled the developing machine. Same went with the additional armor, similar to that of Gundam Alex (0080 War in Pocket).
So here’s the pretty little bugger and a comparison of his stock rifles with the U.C. Arms Gallery variant.