Tippmann 98 Hammerhead Fin Bore Barrel Sizer - 0.686 Optics/Flashlights/Lasers Features: Adjustable rear sight

Features: Adjustable rear sight

By being able to move faster

4-Position Mode Switch

Just pull the pin and throw

Tippmann 98 Hammerhead Fin Bore Barrel Sizer - 0.686 Optics/Flashlights/Lasers Features: Adjustable rear sightHammerhead 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