Go to Ruger's web site. They have sn data you can look up.
100-440 or so
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.
1/10
100-450
If sales falter, yes.
The Ruger website, under customer service, historical data, rifle, M77, will have the serial number ranges for each year of production.
100-400 or so
100-560 or so
see below
100-650 usd
Contact Ruger customer service through the Ruger website. Soem parts will require the rifle be returned to the factory for fitting.
300-500 USD