now i'm really confused- what is legally a sports rifle?
I guess that the definition would depend on what you use you rifle for. As of yet, I have heard of no legal description of an assault rifle. I just know that it is a vague description used by folks who don't like guns.
It could technically applied to all milsurp rifles, as they were once used to assault an enemy's position. That kind of rifle description goes all the way back to the Civil war and further. Single-shots with a bayonet I am sure the American Indian would have called the Winchester an assault weapon, and the trooper as well, when the Indian turned the rifle around.
A sports rifle is any firearm that has been adopted for sporting use. It may be called upon to be a defensive arm.
I suppose that the closest you could get to calling something an assault weapon would be a fully automatic, bang, bang, bang, until you let up on the trigger weapon, used primarily by warring countries.
Arms used for sport or self defense are at times painted with the same "assault rifle" brush to meet political agendas. I am sorry to say this, but your question is stupid, you are arising suspicions from forum members about who you are.
Legal trigger, I guess that you are probably not class three holder, so your legal trigger is one that will fire your weapon one time only for every time you pull it. That is the simple definition I think we can all agree on. There is a second component to the trigger, regarding defensive shooting, is the shooter's brain. He has to know if he needs to respond with deadly force to meet deadly force. The use and consequences of your acts are your responsibility, not your trigger type.
Using deadly force is a morale choice, not to be hampered by the government, however, if you chose it, you must be willing to take the legal consequences if they arise.
If these questions are legit, it is what I always say, the buyer should not be able to accept a weapon until he shows some rudimentary fire-arms knowledge. Military weapon training has always been good.