The Air Venturi Avenge-X Classic PCP Air Rifle with synthetic stock is a modular system that provides premium performance at a reasonable price. The modular nature of the platform means that one air rifle fills many needs, because it can be tuned for numerous uses and also adapted with additional accessories.Specifications and Features: Brand: Air Venturi Product code: AVX-4601-22 - 5.5 mm / .22 Caliber: .22, 6.35 mm Power source: PCP Fill pressure (bar / psi): 300 / 4351 Regulated: Yes Cocking system: Side lever Sights: No open sights Riflescope included: No Mounting rail type: Weaver / Picatinny Stock: Ambidextrous Stock material: Synthetic