My sons father is very uninvolved. Him and I got pregnant after high school and that was it! He is not involved in my sons life but his parents are. Every 3 to four months my sons father stops over his parents and takes my son without my permission and brings him out and does dangerous things with him.He brings him to the shooting range and brings him hunting and is always telling him how cool guns are. I have full legal custody. Can I end this!

YES of course you can end this.
Put a restraining order on him for seeing your son.

But he's allowed to visit my son and spend time with. He just literally never does, but when he does its always violent stuff. My son is 7 and strange as it is thinks the world of him

The less he sees him the better.
Get the court to issue him with instructions
That violent stuff as you call it is not permitted during the visitations.
Give him clear instructions that you do not condone any violence of any sort.
It is only natural that the boy adores his father.
There is the blood relationship at work.
However, you need to ask your son to report to you when and where he is taken.
Seven is old enough to realise your point of view.

Wait - so he has visitation and he doesn't pick your son up himself? Put an end to that. If he wants to use his visitation he comes to get the boy. What does the visitation order say?

If he has visitation, technically he can take the child where he chooses. I would go to court and voice your concerns, however.

YES of course you can end this.
Put a restraining order on him for seeing your son.

There is no grounds for a restraining order here.

The less he sees him the better.
Get the court to issue him with instructions
that violent stuff as you call it is not permitted during the visitations.
Give him clear instructions that you do not condone any violence of any sort.
It is only natural that the boy adores his father.
There is the blood relationship at work.
However, you need to ask your son to report to you when and where he is taken.
Seven is old enough to realise your point of view.

Im not sure where your coming from and some things may be frowned upon but there is a second amendment in this coutry and so long as what he is doing isn't illegal then he has a right to do so. You may not like it or agree but he is within his rights at this point. The only time a gun becomes dangerous is when its handled improprly. That may be a separate issue. But if he is following safety guidelines then there isn't a problem here that I can see.