Altyn / K6-3 Russian Spetsnaz Helmet Keycap (PUBG, Tachanka Helmet)

The handpainted versions have a matt varnish (Premium Acrylic Polyurethane), to protect the paint.
The visor has a glossy varnish, to imitate glass.

The "Primer" Version has a black/gray basecoat. You can paint it by your own.

This keycap has a MX Stemp. 

This is a keycap with a legendary K6-3 / Altyn army helmet.
The helmet is used by the Russian Spetsnaz FSB from the middle of the 1990s until today.
It is also known from the popular game PLAYERUNKNOWN's BATTLEGROUND (level 3 helmet).
The K6-3 and Altyn helmets look very similar but are different models. The visor is made from clear ballistics glass and the helmet itself is made from titanium with a thickness between 4 and 6 mm.