Join the Illinois NRA and Open Carry. Get involved in local politics, learn the position of candidates on gun control no matter what their office and tell everybody you know what you found out. Do not find excuses not to go to the polls on election day and actively support pro-gun candidates. It won't be fast, it wont be easy but it can be done. I am in the same boat as you are here in Wisconsin.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.