Spring airsoft guns are powered by a spring mechanism that needs to be manually cocked before every shot. Most airsoft enthusiasts consider them to be the most reliable air guns, and they also require the least amount of maintenance. The reliability of spring powered airsoft rifles lies in their simplicity since they have less moving parts in comparison to gas and electric guns. One of the other big advantages of spring powered airsoft guns is that they do not require gas or batteries to operate, and as long as you have BBs you can have fun shooting your spring powered airsoft rifle.