FAST Future Assault Shell Technology black modern tactical combat helmet – Custom 3D Printed Miniature Accessory Parts Pieces for Brick Block Figures

This Lego minifigure accessory is a black modern tactical helmet.

It is designed to resemble a FAST (Future Assault Shell Technology) helmet or a similar style of modern combat helmet used by special forces. These helmets are characterized by their cutaway ear shape, side accessory rails, and often a front mount for night vision goggles or other equipment, details which appear to be represented on this piece.

The designation “K25” is likely a seller-specific model or SKU (Stock Keeping Unit) number for this custom Lego-compatible accessory, rather than an official Lego part number or a widely recognized custom model name. This Lego minifigure accessory is a black modern tactical combat helmet.

The design is commonly known as a FAST (Future Assault Shell Technology) helmet, characterized by its high-cut shell, side accessory rails (often called ARC rails), and a front mount, typically for night vision goggles or other equipment. These features are visible in the provided image.