Spring airsoft guns are generally starter guns. If you want a powerful gun, get a c02 or gasoline/propane powered gun. However, most airsoft sniper rifles do use spring (bolt-action) firing speeds, and you can get Sniper rifles for as cheap as 50$ in the U.S.. Look for rifles with 400-500 fps for optimal power.
No
No. Aspects which determine how powerful an airsoft gun is actually it's spring (stronger/harder the spring means bigger fps), compression (better compression = better fps), and weight of the BBs we use (heavier BBs in the same fps can deliver bigger energy).Edit: If a gun that is automatic in real life is spring and very inexpensive, it is probably cheaply made and therefore almost definitely weak. However, "manual" guns that are spring are usually at least fairly powerful, such as bolt action sniper rifles.
No company makes a spring action galil airsoft gun currently.
go for the m14, unless its cheap looking.
A BB gun would be more powerful
No, it is a cheap spring gun and could not be used in an airsoft match
Self protection? As in keeping robbers away from your house? I guess i would go with a gas rifle. They are often the most powerful, but are more expensive. If your are looking for home security, an airsoft gun would not be your best bet. I would go with an actual pellet gun or air rifle. Airsoft guns are more for recreation.
A spring gun? It depends on how fast you can cock the gun. There is not a fastest gun.
If the gun is spring then it is most likely not automatic but if its electric it is most likely automatic.
The fps depends on the brand and quality of the gun. If the gun is high powered spring it is probably at most 350 fps. Most likely the gun is less then this in the 275-315 range.
most cheap spring guns at walmart have very low velocity
Never buy spring guns