They have features which increase their abuse potential without offering compelling reason for these features for legitimate purposes. Easily detachable and swappable magazines seem the most obvious issue. The situations where this feature has a legitimate use case don't justify the abuse situations this feature enables.

My response: WA had 6 gun deaths by rifles of all type (including semi-auto and bolt action) out of 800 gun deaths (including suicide). The year before they had 4.

That is less than 1% by rifles of all types. If they are being abused then the users are very poor at abusing these "features" to kill people.

Rifles, of all types, account for less than 3% of gun deaths nationwide. The vast majority of firearms related deaths are with pistols and revolvers. 4x more people die to knives in the US each year than to all types of rifles. 2x more people die each year in the US to fists than to rifles of all types.

A "feature" based prohibition on a class of rifles because of what someone "might" will not pass many tests in the US or we would not have alcohol, natural gas in the home, dump trucks or any number of other things that "might" be abused to the detriment of others, especially in light of the actual data.