Electric Airsoft rifles /Automatic Electric Guns (AEGs) are the most common type of airsoft gun on the market and probably the most popular at your field. AEG's have many, many pro's over gas or spring guns. Unlike gas you don't have to continually buy batteries and unlike spinggers the battery and motor does the work for you. Also with a AEG you also get the full auto feature and AEG's are highly customizable. With that being said AEG's are usually you best bet when starting off in airsoft, just do your homework and talk to the guys at your local shop before you buy.