The first ever Freak System Compatible barrel designed specifically for the First Strike T15 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 Lapco HushShot and accepts GOG Paintball Freak inserts(.684 included). This new barrel system is quiet, accurate and allows you to make consistent shots.