In this video, we see Airsoft Mike unboxing the CYMA M4 10.5 M-LOK AEG With Tracer Unit & MOSFET. As the title implies, the airsoft gun's key features highlighted in the video include a built-in tracer unit and MOSFET, a full metal build with a CNC machined M-LOK handguard, a Tokyo Marui-compatible Version 2 metal gearbox, and an extended mag release. He also performs a chrono test and an accuracy test, expressing satisfaction with the product and its features.