The dart is entered by the R-angle slope of the flywheel kits. Through the flywheel kits to the aluminum pipe, if the bullet is too soft, it may fold and block in the aluminum pipe. If a cartridge appears, immediately disconnect the power (release the button) and clean the bullet. Avoid line shorts.The maximum number of darts loaded is 45 rounds. It is recommended to install 40 rounds. The darts are staggered from each other and cannot be side by side.The clip is heavy. Hold the clip first when you take it out, then press the clip to release it.Use 14.5mm orange aluminum tube when launching soft darts, 14mm silver aluminum tube when launching hard darts, and remove aluminum tubes when using three flywheel kits.Please use the third generation flywheel kits, can only use strip shape battery, Battery compartment volume: 18*44*108mm or 36*31*108mm