*Discounted Price Since The Stock Doesn’t Lock* Item Is 8/10 New - Very Light Use Free Red Dot, Foregrip & Extra Magazine! The ECHO1 MK16 (ASC) is the latest in Echo 1's long line of affordable AEGs. The Echo 1 ASC has many of the same features of other brands at a fraction of the price with a few of its own. It includes flip up front and rear sights, polymer lower receiver, one piece metal upper receiver, side folding retractable stock, convertible outer barrel, sling attachment points, and an ambidextrous magazine release. However, it does have few surprises of its own. The adjustable cheek rest opens to expose the battery compartment, eliminating the need to disassemble the stock to install the battery. In addition to all these features the MK16 (ASC) includes a battery, charger, barrel extension, standard magazine, and a high capacity magazine.