The Norsso Volcano Piranha XP Slide & Barrel Set includes Volcano Piranha XP Slide and one Norsso 3.7" 9mm Bull Barrel. Both parts are machined from 17-4 PH Stainless Steel. FeaturesDeep, forward Piranha style sawtooth serrations for slide manipulationSignature 3D machined front and top features for ergonomics and press checksLarge volcano end port providing the furthest possible distance from fulcrumTwo expandable C ports for additional porting capabilityNew, Spear Point style fluting down Volcano Bull Barrel shoulder lengthLarger barrel bore only compatible with Norsso N365XL Bull BarrelsMultifaceted contoured front and rear corners