Description
The HS407K-X2 is an open reflex optical sight designed for subcompact pistol applications, built to bring reliable, streamlined dot performance to the smaller-frame carry guns that dominate the concealed carry market. The low, slim profile is perfect for small carry guns, and the roughly 1-ounce weight isn’t noticeable once mounted, making it a natural fit for shooters who want an optic without adding bulk to an already compact pistol.
The HS407K-X2 boasts a Red Super LED, providing 12 brightness intensities for easy visibility day or night, and the crisp 6 MOA dot reticle is built for fast target acquisition — a bolder, quicker-to-find aiming point that suits close-range defensive use over precision distance work. Shake Awake extends battery life to as much as 50,000 hours by using a motion sensor to deactivate the LED when it’s not in use, and waking up when it detects motion, so the dot is live the instant the pistol comes up without needing to be manually powered on.
This version brings a genuinely useful upgrade over earlier 407K models. The HS407K-X2 improves on the previous version by adding Lock Mode, which locks the buttons and prevents inadvertent setting changes — a small feature that matters a lot for a carry optic that spends its life bouncing around in a holster. The durable housing is made from 7075-T6 aluminum with an anodized finish, and the CR1632 battery sits in a convenient side-mounted tray for easy replacement without pulling the optic off the slide. The sight is parallax-free and provides unlimited eye relief, keeping the sight picture consistent regardless of head position behind the gun.
Fitment is straightforward for one of the most popular carry platforms on the market. The sight has a Holosun K footprint that is directly compatible with the Sig Sauer P365X and P365XL, though it requires an adapter plate for slides with a four-boss interface.
