Ruger has learned that the trigger overtravel adjustment set screw in a few of its M77® bolt action rifles manufactured between 1968 and 1991 may not be securely tightened and may move too readily. This change in original adjustment can, in extreme cases, either cause the rifle to fire unexpectedly (with the safety "off") or cause the rifle to not fire at all. This may occur suddenly and without warning. Ruger® M77® bolt action rifles produced in later years have this set screw permanently secured. This condition cannot occur in any of our other firearms as their trigger mechanisms differ. Please note in particular that this condition cannot occur in Ruger® M77® Mark II bolt action rifles, which are of an entirely different design.
How To Determine If Your M77® Is Subject To This Warning:
Do not use your M77® rifle until you have received and installed the replacement screw.
Step 2 - We will verify that your rifle is eligible for the new set screw, and if so, will send you a new locking screw that will replace your present overtravel adjustments set screw and detailed instructions for quick, easy installation. There is no charge for this service and replacing the screw will have no adverse effect on trigger pull.