The universal bore guide is designed to enhance firearm maintenance by preventing bore cleaners from dripping into the action, thereby maintaining the integrity of the firearm's internal components. It effectively minimizes excessive contact between cleaning rods and the rifling lands nearest to the chamber, ensuring a more precise and careful cleaning process. This tool is essential for preserving the accuracy and longevity of your firearm by reducing wear and tear during routine maintenance. Three interchangeable chamber tips compatible with calibers ranging from .17 to .416 The aluminum action collar is compatible with bolt actions measuring .695" to .700" (17.65mm to 17.78mm) in diameter, regardless of the action length A threaded brass pin secures the guide within the action, replacing the bolt to facilitate proper cleaning from the breech