I don't know your skill level since this is your first post here. I suggest you take it to a gunsmith and have him fix it for you. This could be life or death and you don't want to take any chances.
Welcome here. Please head over to the introductions forum and introduce yourself to the folks when you get the chance.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams