Free: Contests & Raffles.
What brand are they? If the other bolt works fine, maybe replace it and shoot it. Even if the gas keys are staked, some of the screws are of subpar metals and cannot be properly staked no matter how hard you try.
What make and model??? or are they all Custom?? I have found that they are very easy to work with. I would buy quality components and re-build what you have to make them work. If you don't mind me asking what did you pay and what components were used to make them? Johnny