Caliber – 4.5mm / .177cal Max. Muzzle Velocity (*) – 355m/s (1170fps) Energy – 19.9J Magazine Capacity – 10 Number of Shots Per Fill – 160 Number of Shots at Optimal Velocity – 55 Stock – Bullpup, advanced polymer, thumbhole, elevation adjustable comb Overall Length – 935mm (36.8”) Barrel Length – 585 mm (23”) Average Weight – 4.3 kg (9.5lbs)