Greetings,
I build these out, you need to order #8-40 screws from EGW. Here are the two mounts available and have slight differences which will be obvious. If there are any questions about reloading or any other subject about this specific rifle please feel free to contact me. If you reload, it is really quite cheap to shoot because for obvious reasons you don't shoot it a lot.
Best Wishes
Nate Jaeger