Mechanical Keyboard Switch Midnight Pro Keystem DIY Tactile Liner

In this review of the Kailh Midnight Pro switches, the conclusion is simple: these are for keyboard builders who want a reliably smooth, linear keystroke with durable parts and easy compatibility. The reviewer found the Midnight Pro's 40gf operation force and MX-style stem deliver a consistent, low-effort press that suits long typing sessions and fast gaming. Our review highlights the switch's standout quality-an ultra-smooth travel and reassuring build life-while noting tradeoffs for those seeking clicky or tactile-only feedback.

Key Features

• 40gf operation force: Provides a light, consistent actuation that reduces finger fatigue during extended typing or gaming sessions.
• Linear 4.00.4mm travel: Delivers a smooth, uninterrupted keystroke that feels cohesive from top to bottom for fluid typing and rapid key repeats.
• Approximate 70 million keystroke lifespan: Offers high durability so builders can expect long-term reliability without frequent replacements.
• MX-style 5-pin compatibility: Fits most X-stem keycaps and 5-pin PCB hot-swappable boards, simplifying installation in DIY builds.
• Well packed set of 110pcs: Supplies enough switches for a full 5-pin keyboard layout plus a few spares for modding or testing.

Who It's For

The Kailh Midnight Pro switches are best for DIY keyboard enthusiasts and gamers who prefer a smooth, linear keypress and want a long-lasting switch. Builders who use MX-style keycaps or 5-pin PCBs will appreciate immediate compatibility and the simple fit of these switches into common hot-swap plates.

These switches are less suitable for users seeking tactile bumps or loud click feedback; anyone wanting a pronounced tactile or clicky feel should consider other switch types. Also, audiophile modders may still want to lube or otherwise modify the switches to reach a specific sound profile.

Pros & Cons

Pros

• Ultra-smooth linear travel that feels consistent across the set for comfortable daily use.
• Light 40gf actuation force reduces strain for fast typists and gamers.
• Long rated lifespan of roughly 70 million keystrokes adds durability for heavy users.
• Wide compatibility with MX-style keycaps and 5-pin hot-swappable PCBs simplifies installation.

Cons

• Linear profile may disappoint users who prefer tactile bumps or audible clicks.
• Serious sound or feel customization may still require lubing or modding for optimal results.

Specifications

Brand	KAILH
Switch type	Linear
Operation force	40gf
Total travel	4.00.4mm
Pin count	5-pin (PCB compatible)
Lifespan	Approx. 70 million keystrokes
Pack quantity	110 PCS

Our Verdict

The Kailh Midnight Pro is a strong choice for builders who want a smooth, lightweight linear switch with proven durability and broad MX-style compatibility. It offers good long-term value for gamers and typists seeking consistency, though anyone wanting tactile feedback should look elsewhere or plan to test different switch families.

Frequently Asked Questions

Are these compatible with standard MX keycaps?
Yes. The Midnight Pro uses an MX-style X-stem so it fits most MX-compatible keycap sets.

Can these be used in hot-swap boards?
Yes. They are 5-pin switches and are compatible with 5-pin PCB hot-swappable keyboards.

Do they require lubrication to be smooth?
They are designed to be ultra-smooth out of the box, but some users may lube them for personal sound or feel preferences.