The concept for large-caliber models

A balanced range for barrel length, regulated working pressure and projectile weight.
For 7.62 mm and 9 mm models, the kinetic energy generated by higher pressure delivers substantial thrust. This also requires a longer barrel to accommodate the full acceleration phase.

During development trials, we tested a longer 700 mm barrel with JSB standard pellets. Approximately 1000 FPS for the 7.62 mm caliber and 950 FPS for the 9 mm caliber, with regulated pressure set at 200 BAR. 600 mm barrel with JSB standard pellets. Approximately 950 FPS for the 7.62 mm caliber and 850 FPS for the 9 mm caliber, with same regulated setting.

When raising the regulated pressure, the 9 mm model can readily go above 1000 FPS.