BSA - that rifle looks like it’s in great condition.
It looks like your grandpa fitted a Redfield peep sight which I suspect was modified to fit around the rear bulge in the receiver - it’s quite a beefy sight. You have a nice rifle.
Thanks JFE. Yes, it is a redfield sight. My grandpa was very handy, so it is possible he modified the sight. It looks like it was made for this rifle. I just figured they made a redfield for this particular model 94? My grandpa was a machinist and welder, so anything was possible with him. ha ha...