This is Shirogorov Quantum M390 Ti folding knife.
This model is winner of the Blade Show 2019 "Best Tactical Folder" - full custom on photo below.
Blade's material: M390 (MRBS bearings)
Blade length: 3.75 '' (95 mm)
Overall length: 8.78 '' (223 mm)
Blade thickness: 0.16 '' (4 mm)
Lock type: Frame-lock
Handle material: Titanium
Brand: Shirogorov knives
Country of producer: Russia