What is manufacture date of a 188 series Ruger mini 14 ranch rifle?

Answer 1

Between 1989 and 1995 is the best that can be told with the info given. Go to the Ruger website (see related link at the bottom), and under "Customer Service" you'll see a drop-down menu which appears when you hover the cursor over it. One of the options will be "Instruction Manuals and Product History", which you'll click on next. A new page will open in the main frame - click on "Rifle Instruction Manuals and Product History". That will open up a new menu, from which you'll select "Mini 14 Ranch (manufactured from 1982 to 2004" and click on that. A new (pop up) window will open, containing information which can help you narrow it down to a specific year. If you want a specific month, you'll have to contact Ruger.