To load a pneumatic speargun, you use a "loader". This comes with the gun when you purchase it and is a small black plastic hand piece. This is held on the tip of the spear and is what you use to push the spear in to the gun against the air pressure. Generally you will use your thigh as the supporter to help push the spear in. We recommend tying some thin rope to your loader and have it connected to your belt or your speargun to prevent dropping or losing it.