Ok a friend has a good shape BWK-92 and he wants to sell it. I am trying to research it and seems that a lot break firing pins and those are near impossible to find. It has a few mags so I'm not worried about that. Will a 5.45 or 223 bolt from a saiga or bulgy or romy etc fit? I know it would need headspaced but I just want to make sure if all else fails I could get another bolt and have it headspaced instead of end up searching for hard to find chicom parts.