Three simple steps to reloadThe Mace® pepper gun refill cartridges make reload your Mace Brand Pepper Gun easy. Follow these three quick steps:1. Push the barrel release on the side of the gun forward and open the barrel.2. Grasp the exposed portion of the old cartridge and gently pull it outward to remove it from the barrel.3. Insert the new cartridge into the barrel, careful not to press onto the cartridge, then close and lock the barrel.Enhanced control, accuracy, and safetyAfter reloading, your pepper gun is ready to deliver maximum security and accuracy.• Slide-release safety switch to prevent accidental discharge• Pistol-grip design for point-and-shoot accuracyAlways readyCustomers are responsible to know their state and local laws with this product.