eNMy paintball guns are a spring less, purely pneumatic mechanical paintball gun. The eNMy paintball gun is designed with the entry level player in mind who is looking for a paintball gun that does not require consistent maintenance so they can focus on developing their game. With an easy to remove, out the back bolt system, greasing this paintball gun is as easy as shooting it. Whether you use C02 or an hpa tank, the eNMy will work just fine. The eNMy paintball gun is meant for those who are getting into paintball and need a high performance mechanical paintball gun. The GOG eNMy paintball gun is covered by a lifetime warranty.