I've got 111 .300 win mag that i'm going to mod out. Serial number starts with 'F6' so it places the manufacture date between 1995-2002. I'm finding a problem when looking for aftermarket stocks, triggers, mounts...etc. I can't seem to find what really fits my gun because I've read that barrel diameter during those years isn't consistently the same size, and actions varied as well. I built my AR, but that was easy because the platform is same between manufacturers.

The real question is...How do I know what will and what will not fit my gun? Looking at various stocks I haven't been able get responses from dealers regarding bedding width and depth. Last thing I want to do is buy new components and have to ship it all back.