I'm looking for a shield not for service, but for safety training demonstrations. Does anyone know which option is best for training?

I think weight is the biggest deciding factor, especially if you have to move a lot.

Once, I was helping a trainer friend choose protective equipment, and he was looking at options on rtstactical. He mentioned that they have good descriptions specifically for resistance to various threats. I haven't personally purchased any, but I often check there to see what's new, as they occasionally add new models. My friend mentioned that a balance between size and maneuverability is important for training. They have both large and compact options, perfect for a variety of tasks. So, the site is a good choice if you're looking for a ballistic shield or thinking about buying one.