Those attachments are the standard gear that you find on a paintball gun. The Round thing that you see on the top is the magazine and it houses the ammunition. Guessing by the size of that magazine I would say it will house around 70-100 rounds. The cylindrical structure that you see at the back attached to the grip handle of the gun is actually a Compressed C02 (Carbon Di Oxide) Canister. It is used to provide pressure so that the paintballs can be fired. This is a G-3A3 that is strictly for training purposes. You can use this gun to fire balls that contain paint at your simulated enemy. When the rounds hit they break and spill out the paint and the target is covered in a distinct colour. Thus you know if your target is "Dead" or not.Can anyone tell me what are those attachments or things along with G-3 rifle in the 5th picture.
Though I am not sure if it is effective or not. Because that Magazine on top screws the whole Aim of the gun.