The FX Biathlon MKII rifle is built in the spirit of the Olympic competition rimfire guns. This MKII version has been updated and rebuilt around the world class FX Smooth Twist X barrel system. The Smooth Twist X rifled barrel chambered in .177 caliber, provides consistent high-level accuracy that will stand up against any match barrel available. The rifle comes with a straight pull biathlon bolt that is cycled using the distinctive thumb and forefinger method. Cocking system Sidelever, straight pull with thumb return. Magazine type Removable. 13 Shot Cal .177 Stock Synthetic: Adjustable Cheek Piece Height/Offset Adjustable, Recoil Pad Height/Length Adj, Harness Rails on Both Sides, Holes for Harness in the Rear of the Stock, Sling Rail in the Guns Underside, Holes for Sling in the Rear of the Stock. Calibre 4,5 (.177) Barrel FX Smooth Twist X Match Grade Length 4,5 (.177): 500mm Optics 11mm Dovetail Front and Rear Trigger Adjustable Match Trigger Energy 4,5 (.177): 24J • 18 ft/lbs Weight 2,9 kg Charging Quick Charge System MkI