Their are many weapons in the Gundam universe a few of my favorites are Beam sabers, shields, and a wide variety of laser gun weapons. They also have a core block system that combines other mech into their body. Everything from fighter jet aircraft to tank systems. The Gundam sister systems like the gun tank and gun cannon can also utilize the core block system.
I will go into greater detail of these systems as I develop my blogs so look out for them.