Goah's weaponry is rather unique for its time. It is capable of transforming into almost any other type of weapon thanks for its easily removable and replaceable parts. He can wield two sub machine guns or combine it to create a sniper rifle. He could also shift it into a shotgun, an assault rifle, or a heavy chain gun. The image shown is its sub machine gun form. The iron sight is just a cosmetic feature since Goah's helmet can show him where his bullets will land anyways, even showing where they will ricochet, providing him with accuracy unmatched to any human.
My very first attempt at color blending. Oh god this was a long project. Took about a week with at least 2-3 hours each day and the last couple days even more just so I can get this out. I could've smoothed and refined it a little but it was taking too much time and I wanted to work on my other projects. Enjoy!