Time for another ASMR session with 4UAD Smart Airsoft as they put together an upgraded SIG 552 AEG from ICS Airsoft by equipping with a DV Brushless AEG  motor and adding a Jefftron ETU. As for the suppressor mounted, it is the RGW suppressor. Watch carefully the installation which includes a mag dump to check how it performs. Just try to stay awake as ASMRs usually lull us to sleep.