The first ever Freak System Compatible barrel designed specifically for the First Strike FSC/XP is here. Sizing your barrel bore size to your chosen projectile size is Paintball 101 and now you can do so without owning 5+ barrels. Each barrel is precision machined with 7/8-20 threaded tip and accepts GOG Paintball Freak inserts(.684 included). This new barrel system is quiet, accurate and allows you to make consistent shots.