Gamo makes one that can reach 1600 feet per second in .177 cal
The batteries make the gun go full auto.
Not designed for full auto modification.
The most power full gun used in close quarter fighting was the German MG-42. The Mg-42 was capable of firing 1,200 rounds a minute. The MG-42 was great because of its fire power and it light weight (25 lb.)
PDW 57. that gun has NO recoil and TOO much power.
You will have to replace the butt stock.
Buy a Spyder E-trigger.
In the truest sense of the definition of "automatic", no a bb gun cannot be automatic. In function, however, a BB gun can be automatic. A good example would be the Drozd BB gun which fires full automatic, but used CO2 as the power source.
If you are asking about Air Soft, then most likely not. But if you are asking about a BB or pellet gun then Yes it is possible depending on the power of the air gun and where you are struck.
While some would say the Gatling gun was the first,I consider the Maxim machine gun the first true full auto machine gun.
Safest airsoft gun? The most dependable guns are KWA or G&G there is not one that is more dependable than the other. Also, it depends from gun to gun. some are lemons and never work properly while others are a dream. Really the most important thing is to get a full metal gun. that way its less prone to break.
Go in the teleporter to pack-a-punch your best gun for 5000 points to get more ammo, make the gun stronger, and have a better design.
The IZH Drozd is a full auto BB gun.