I have and run the First Strike upgrade kit in my T8. The kit consist of a:
- New barrel that is useable on both a T8 or T9, that is cut for both First Strikes and standard paint
- New detents
- New bolt
- New bolt spring
- First Strike/8.1 Magazine with magazine springs (red for First Strikes and silver for standard)
I have since moved to a LAPCO Str8shot .690 barrel. STR8 Shot T9 9 Inch First Strike .690 Bead Blasted Black
However, I still use everything else.