HMX Firecracker Tactile Switches

The HMX Firecracker is a tactile mechanical keyboard switch suited for users who want a noticeable tactile bump with a clear, clacky bottom-out sound that is not overly loud. It fits typists who appreciate a defined feedback pattern and a slightly heavier actuation force. The switch is less ideal for those seeking a quiet or linear typing experience.

Feel & Sound

• Features a P-shaped tactile bump that provides a distinct, satisfying tactile response.
• Bottom-out sound is full and clacky due to the POK stem and nylon housing combination, offering audible feedback without being too loud.
• Pre-travel of 2.5mm and total travel around 3.5mm create a moderate keypress depth suitable for typing comfort.

Actuation Characteristics

• Operating force of about 40g requires a moderate amount of pressure, which can reduce accidental key presses.
• Bottom-out force is higher at approximately 58g, contributing to a firm feel when fully pressed.
• The spring is a 22mm KOS single-stage extended type, supporting consistent force throughout the keypress.

Build Quality

• Uses a POK stem, which is uncommon and contributes to the switch’s unique sound and feel.
• Housing is made from nylon (top P3, bottom P6), providing durability and a slightly softer bottom-out compared to harder plastics.
• Factory lubed with a thin coat of 205g0 on stem legs and sliders, plus dry film lubrication on spring and leaf, reducing initial scratchiness and noise.

Trade-offs

• The clacky sound may be distracting in quiet environments or shared workspaces.
• Moderate to high actuation force might cause fatigue for users preferring lighter switches.
• Unknown compatibility details such as PCB mount type or LED support.