BattleStikxx 684®is
specifically made for "Small caliber" paint. We consider any paint
0.684 or less, small caliber. Even when using sizers, the greater the
difference between the ball size and barrel front results in reduced
accuracy, distance and air efficiency for any barrel. As a result, we
are making the small bore barrel at our players request. The barrel is
specifically designed for small bore paint to achieve significantly
improved accuracy, air efficiency, and distance. Because the
Battlestikxx684® has the exact same thread specifications used in with
all Hammerhead products, the Battlestikxx684® can be used in
conjunction with all existing Hammerhead fins and muzzles.