HOLOSUN HS407K X2 Red Dot Sight for Subcompact Pistols - Compact

In this review the HOLOSUN HS407K X2 is evaluated as a compact red dot designed specifically for subcompact pistols where footprint, battery life, and reliability matter most. The bottom line: this optic is for concealed-carry and compact handgun owners who want a crisp 6 MOA red dot with exceptionally long battery life and simple, rugged construction. It excels when paired with pistols that accept Holosun's K footprint or with the correct adapter plate for four-boss slides.

Key Features

• Compact open reflex design: The sight's small window and K footprint make it suited to subcompact pistols and tight slide profiles without adding unnecessary bulk.
• Long battery life: A Red Super LED and efficient electronics deliver up to 50,000 hours of runtime, reducing the need for frequent battery changes.
• Shake Awake technology: The optic conserves power by deactivating the LED when idle and instantly reactivates with movement or a touch for ready use.
• Durable aluminum housing: Constructed from 7075 T6 aluminum with an anodized finish, the sight stands up to everyday carry and handling.
• Side-access battery tray: The CR1620 battery is housed in a side-mounted tray for quick replacement without removing the sight from the slide.
• Multiple brightness settings: Twelve reticle intensity settings including daylight and low options let users tune visibility for different lighting conditions.

Who It's For

The HS407K X2 is aimed at owners of subcompact carry pistols who want a simple, reliable red dot with long battery life and minimal footprint. It suits shooters who prioritize quick target acquisition with a crisp 6 MOA dot and need a sight that tolerates everyday use and handling.

Those who should look elsewhere include shooters who require magnification, a dot smaller than 6 MOA for very tight precision work, or those with slide patterns that cannot accept the K footprint and who do not want to source an adapter plate. Full-size rifle or long-range shooters will also want a different optic.

Pros & Cons

Pros

• Excellent battery life and energy efficiency thanks to the Red Super LED and Shake Awake function.
• Solid, compact build with 7075 T6 aluminum housing that balances weight and durability for carry pistols.
• Side-mounted CR1620 tray simplifies battery changes in the field.
• Clear, high-contrast 6 MOA reticle with multiple brightness settings for varied lighting.

Cons

• Requires an adapter plate for slides with a four-boss interface, which adds cost and fitment steps for some pistols.
• Open reflex window is compact, which can feel restrictive to shooters who prefer larger sight windows.

Specifications

Reticle	6 MOA Dot
Light wavelength	650nm
Magnification	1x
Battery type & life	CR1620, up to 50,000 hours
Housing material	7075 T6 Aluminum
Window size	0.58 x 0.77 in
Adjustment per click	1.5 MOA

Our Verdict

The HOLOSUN HS407K X2 is a sensible, value-oriented reflex sight for subcompact pistols, offering long battery life, rugged aluminum construction, and easy battery access. It is a strong choice for concealed-carry owners and anyone fitting a pistol that accepts the K footprint, delivering dependable performance without unnecessary complexity.

Frequently Asked Questions

Will this sight fit my subcompact pistol?
It fits pistols accepting Holosun's K footprint directly; slides with a four-boss interface will need an adapter plate for mounting.

How long does the battery last in normal use?
Using the efficient Red Super LED and Shake Awake, the CR1620 battery life is rated up to 50,000 hours depending on settings and usage patterns.

Can the Shake Awake feature be disabled?
Yes, Shake Awake can be deactivated if a user prefers the optic to remain always on while powered.