I have a ruger m77 markII bolt action. Beautiful rifle and i absolutely love it. This has a mag and trap door. What id like to do is remover the trap door and modify or retro fit for a removable 10-15 round magazine. I have been ALL over the internet and have not been able to find a kit or something to do this. Has anyone done this before or happen to know if there is even a kit available to make this happen?