Semi-automatic is a single round per trigger pull. These will not mow anything down.
Unless you still have acid in your spinal column, are currently are high, or cry for the trees, "assault weapon" is not about features (looks) but function.
Ignorant people (usually that live in big cities) should not use the term "assault weapon", or "automatic" if they do not know what that means.
A true "assault weapon" is only available in the military, or requires a special firearm license to even get issued by the government.
If it fires one round per trigger pull, it is just a rifle... Please don't use ignorant terms like the media (mentioned above), and politicians, because you will look stupid AND ignorant. If it is black, don't be a racist and call it an "assault weapon", or "automatic" because it is black, educate yourself but not in a liberal college regurgitating terms of ignorance...