FIRST STRIKE T15 Universal Bolt - 416-01-0084

 First Strike (Tiberius Arms) Factory replacement part: 416-01-0083

FIRST STRIKE (Tiberius Arms) Factory replacement part: T15 Bolt Complete

FIRST STRIKE (Tiberius Arms) Factory replacement part: AR11A004

First Strike (Tiberius Arms) Factory replacement part: AR12C106

FIRST STRIKE Factory replacement part: AR12A102. (Newer "large hole' style for the latest T15 receiver.  If you have an older T15, this receiver sleeve will not work in your upper).