Geonox Airsoft tries the Delta Armory Full Metal MK18 AEG that comes equipped with an ETU and MOSFET... "In this video we look at the Delta Armory MK18 full metal with ETU and mosfet in dual tone. It is an AEG. It is under 0.5 joules and has semi and full auto. It is well suited for indoor use and, with a range of 43 m, is also very good for 0.5 joules of game days in the forest."