Whether you have a current Remington Model 700 and are dissatisfied with the Integrated Security System bolt shroud or if it's just time to give your old Model 700 a much needed tune-up, this drop-in PTG Non-ISS Traditional Firing Pin Assembly is the answer.Notes: Remington's Integrated Security System has a J-shaped slot in a button that protrudes from the left rear of the bolt. A key inserts into the slot to turn the button and lock the action open.