This is a 34 inch aluminum rib extension to glue on your existing Perazzi Tm1. It raises your rib by half an inch. The bottom has been not out so you don’t have to remove your front or your deadbeat 32 will be installed. All you need to do is heat up with blow dryer and mount, this is perfect for the guy who doesn’t wanna buy another barrel, but wants to keep his head slightly more upright 300$