Real Avid AVARTMK AR-15 Tactical Maintenance Kit 223 Rem 22 Cal 5.56x45mm NATO AR-15 ALL THE TOOLS YOU NEED TO CLEAN AND MAINTAIN YOUR AR15: Critical to AR15 performance is the bolt, bore and chamber. Working in unison, when one goes down, they all go down. This smart, organized kit allows you to be fully equipped on the bench or in the field with all the tools necessary to properly maintain and clean your AR15. Keep It Ready!