UKA-M900ADescription: This Rifle AEG Rifle by DE features a durable full metal outer barrel and shoots in both semi automatic and full automatic mode that gives you an advantage over spring airsoft rifles that can only fire one round at a time. Similar to high end AEGs, this electric airsoft rifle comes with an adjustable hop up unit that allows you to quickly adjust the backspin of your BBs. This makes sure that your rounds hit your targets. But for an AEG