specification CALIBER 4.5mm(.177)/5.5mm(.22) VELOCITY Cal 4.5 0.55g pellets,specialized from 3 to 8 joule Cal 5.5 1.0g pellets, specialized from 3 to 8 joule WEIGHT 920g REAR SIGHT Adjustable for elevation and windage TRIGGER adjustable,0.5-4Lbf STOCK German Beech without chequered L*W*H 390*48*146(mm) MAGAZINE 4.5(.177) holds 9 pellets 5.5(.22) holds 7 pellets