FRONTIER Hollow Space Outpost CNC Aluminum Keycap Set

The FRONTIER Hollow Space Outpost keycap set brings a sci-fi metal aesthetic to custom mechanical keyboards. Made from CNC-machined aluminum alloy with a hollow structure, it offers a premium metallic look, RGB-friendly light spill, and a Cherry-style typing feel.

Key Features

• CNC-machined aluminum alloy construction with a solid metal texture
• Hollow space-inspired design for a distinctive futuristic look
• Light-transmitting openwork structure for visible RGB spill
• Laser engraving, oil filling, and spray-coated finish
• Cherry-style original profile for a familiar typing height
• MX-style cross-stem fit for broad keycap compatibility

Design and Feel

The Hollow series is designed for keyboard enthusiasts who want a refined metal keycap set with a mechanical sci-fi theme. The open cutouts create a striking lighting effect on RGB keyboards, especially when paired with LEDs positioned below or toward the front of the board.

Lighting Note

The hollow structure is intended to let light pass through the keycap body. Based on the source information, the legends themselves may not be fully shine-through, so the main lighting effect comes from the cutout design rather than illuminated characters.

Specifications

• Brand: FRONTIER / Boundary Peripherals
• Model: Hollow
• Theme: Space Outpost
• Material: CNC aluminum alloy
• Process: CNC machining, laser engraving, oil filling, spray coating
• Profile: Cherry-style original profile
• Stem Fit: MX-style cross stem
• Product Type: Keycaps only

Compatibility

These keycaps are designed for keyboards that use MX-compatible cross stems. They may fit many mechanical keyboards and compatible Hall Effect boards that support MX-style keycaps. Always check your keyboard layout, stabilizer sizes, and keycap compatibility before purchasing.

• Compatible with many MX-style mechanical keyboards
• May work with some Hall Effect and magnetic keyboards using MX-style stems
• Suitable for enthusiast and gaming keyboard builds with the correct layout

What’s Included

• Keycap set only

Keyboard, switches, stabilizers, and other accessories are not included unless shown otherwise.

FAQ

Is this a complete keyboard?

No. This product is a keycap set only.

Are the keycaps compatible with MX switches?

Yes. The source specifications indicate MX-style cross-stem compatibility.

Do the legends shine through?

The hollow aluminum design supports RGB light spill, but the legends themselves may not be fully shine-through.

Will the metal keycaps get an oily shine?

The source notes indicate they are not expected to develop the same oily shine seen on some plastic keycaps.