Picked up an older model Ruger M77 International full wood carbine with tang safety, red pad, adjustable trigger, etc. I haven't owned one since the early 80's and need a bit of info. Is there a way to tell by serial number when the rifle was made? What is the function of the screw in the bottom of the slot for the front sight blade? Is there a Ruger rifle forum somewhere on-line? Thanks.




















































