Perhaps there is nothing that relaxes airsoft players more than watching an ASMR session with an airsoft gun. That's what 4UAD Smart Airsoft does in their ASMR series as they put together a Tokyo Marui M4A1 MWS Gas Blowback Rifle fitted with a GBL Short Ball. It also has a 5KU folding stock and other accessories. Video also includes a test fire and mag dump to check reliability.