This is a Benjamin Sheridan known as the Akela chambered in 22PEL, model BPA22W.
Benjamin's line of PCP (Pre-Charged Pneumatic) airguns provide higher consistency and more shots per charge than a traditional CO2 cartridge.
Features:
CALIBER: 0.22
POWERPLANT: PCP
LEAD PELLET VELOCITY: Up to 1000 fps
ACTION: Bolt Action
LENGTH: 32.89 in
PRODUCT WEIGHT: 7.71 lbs
MAGAZINE: Rotary Magazine
MOUNTING RAIL: Picatinny
NOISE SUPPRESSION: Yes
TRIGGER: Two Stage