How do you disassemble a BSA mercury?

To disassemble a BSA Mercury air rifle, first ensure the rifle is unloaded and the safety is engaged. Remove the stock by unscrewing the screws that secure it to the action. Next, carefully remove the trigger mechanism by unscrewing it from the action. Finally, separate the barrel from the action by loosening the barrel pivot screw and gently pulling the barrel away. Always consult a service manual for specific instructions and safety precautions.