(AP Photo/Elaine Thompson, File) Oklahoma is already one of the most Second Amendment-friendly states in the nation, with Constitutional Carry going into effect last year and efforts to declare the state a Second Amendment Sanctuary underway, but lawmakers are also pushing a bill that would end the use of the federal NICS system for background checks on gun purchases. House Bill 1630 would make a number of changes to state law, but the move away from NICS is what’s garnering the most attention and opposition. “A person with a mental health illness, a person that has been diagnosed, a person that has been, that has a tendency for violence, that person can now purchase a firearm,” said State Rep. Jason Lowe, (D) OK House District 97.