Bе́rto Pratama takes a look at this M16A4 Marine-ENV AEG made by AIMTOP... "For older airsofters, this unit may be familiar, Yes! this is M16A4 from Aimtop Taiwan. This time I will review this unit again. This unit uses a battery-operated AEG system, the standard FPS of this unit is around 320-340, because the internals are quite good.