What are electric airsoft rifles?
"Airsoft" is a general classification for any type of gun that uses plastic or biodegradable type BBs larger than the common steel, copper or other metal BB sold in many sporting goods stores. Common metal BBs are usually sold as a .177 caliber (4.5mm) size. Airsoft BBs are 6 mm caliber but are sold according to the weight of the BB. The most common weight airsoft BB is .12 grams, but heavier BBs are available in at least two other sizes, .20 and .23 grams. They can also shoot small paint balls in addition to the more common plastic pellets.