The Echo 1 AK CPM Full Metal AEG is one of the best AK replicas in the market today. This awesome gun is made with extremely durable ABS plastic, and features a high-capacity 500 Rd magazine, a shot velocity of 375 fps (using .20g BBs), and fires at an astounding 800 rpm! The folding stock locks onto the side of the receiver and allows excellent access to the fire selector. The Echo 1 AK CPM Full Metal AEG is an excellent gun for cqb skirmish situations. Airsoft enthusiasts, take aim and fire! Features: Semi/Fully Automatic Firing Battery: 8.4v or 9.6v AK Stick Type Adjustable Hop Up Ammo type: High Polished .2g - .25g