Hammerhead Classic Barrel Fin Sizer Size:.693 The AG1 formula strengthens the

The AG1 formula strengthens the shell and helps prevent chamber breaks

drop-leg holsters

- Sierra One

- 1 x 12 inch barrel

- Mounts on any 20mm rail

Hammerhead Classic Barrel Fin Sizer Size:.693 The AG1 formula strengthens theHammerhead Fins (Sizers) are designed to match the ball size to the barrel. The type of ball, weather and manufacturers tolerances can all have an affect on a paintball size. To optimize your barrel performance it makes sense to have the right sizer for the ball used that day. Hammerhead Fins are 2" in length which is an optimal length based on the amount of air pressure that occurs during the first two inches of a ball being shot out of a paintball