I have the Ataman AP16 with all the accessories available including extra air tanks. Can the tank be refilled on the pistol and then removed for future use? Can the tanks be refilled when off the pistol? I had the safety fall off onto the floor. I did put it back in place but why did it fall out and will it stay in place? Paid over $1400.00 for the pistol and accessories and the safety fill toost for sure the floor. If it fill out while outside the safety would be lost for sure. Any replies to [email protected] would be appreciated.