What is the age of a ruger m77 with serial number 789-94289?

Answer 1

The serial number indicates it was manufactured in 2003. For a specific month, you can call Ruger at 603-865-2424. If nobody answers, you'll get an answering machine. Leave a message telling them what type of rifle it is (in your case, it's the M77 Mk. II), the serial number, and what information you want about it specifically (date of manufacture, specific catalog number, etc.), and a contact phone number or email, and they'll typically get back to you within a week.