Benjamin Vaporizer SBD Air Rifle, Nitro Piston Elite Nitro Piston Elite (gas piston) Breakbarrel Single-shot Rifled steel barrel Adjustable 2-stage trigger CBT=Clean Break Trigger Front and rear sights Picatinny optics rail Manual safety All-weather black synthetic stock with grey soft-touch inserts SBD sound suppression system (Gold Level) Sling mounts (rear post/front loop) Includes CenterPoint 3-9x40 AO scope Benefits of the Nitro Piston over a metal mainspring: Smoother cocking Smoother shooting No spring torque No spring fatigue, even if left cocked for hours Functions perfectly in cold weather Lasts longer than a metal spring