We can't tell without the serial number- but if you go to the Ruger website, under Customer Service, you can see the year of manufacture for serial numbers. You will need the spefic model of your rifle.
Contact Ruger customer service through the Ruger website. Soem parts will require the rifle be returned to the factory for fitting.
The Ruger website, under customer service, historical data, rifle, M77, will have the serial number ranges for each year of production.
That's the serial number, not the model number. The year of manufacture appears to be 1984. More details can be had by leaving a message including the model of rifle and serial number with Ruger customer service at 603-865-2442.With the serial number that you have supplied,79-51197 your Ruger model 77 rifle was made in the year 1985.
100-1000 depending on specifics
100-440 or so
1/10
100-450
If sales falter, yes.
Go to Ruger's web site. They have sn data you can look up.
100-400 or so
see below
100-560 or so