Description

The HS407K-X2 is Holosun’s micro red dot for carry pistols, sized so it does not overhang the slide of a subcompact and does not print through a shirt. The reticle is a single 6 MOA dot, deliberately bigger than a rifle dot: at defensive distances a bold dot is faster to find under stress and easier to track through recoil, and the precision a 2 MOA dot buys is not what this optic is for. The glass is multi-coated with a wide-open frame, and the housing is 7075-T6 aluminum, hard anodized, rated IP67 and to 5000G of vibration, which is the kind of abuse a slide-mounted optic actually sees.

The X2 revision is about the controls. Lock Mode disables the buttons so a brightness setting cannot get bumped in a holster or during a draw, and Shake Awake sleeps the dot when the pistol sits still and wakes it the instant it moves, so it can be carried on with the battery lasting years. The CR1632 loads from a side tray, so the battery gets changed without pulling the optic off the slide and without re-zeroing. It mounts directly to Holosun K and compatible RMSc-pattern slide cuts, with no plate or mount included or needed.

Key Features

• Optic Type: Open reflex red dot
• Magnification: 1x
• Window Size: 0.58″ x 0.77″
• Mounting Footprint: Holosun K (modified RMSc pattern)
• Reticle: 6 MOA red dot
• Illumination: Red Super LED, 650nm; 12 settings (10 daylight, 2 night vision)
• Adjustment Click Value: 1 MOA
• Total W/E Travel: 30 MOA
• Eye Relief: Unlimited
• Parallax: Free
• Weight: 1 oz
• Length: 1.6″
• Power: (1) CR1632 included, approx. 50,000 hr battery life at setting 6
• Weatherproofing: IP67, 5000G vibration rated
• Mounts Included: None; direct mount to slide
• Warranty: Limited lifetime on housing and optics; 10 years on the LED
• Country of Manufacture: Not published

Optical & Mechanical Specifications

• Lens Coatings: Multi-coated
• Housing Material & Finish: 7075-T6 aluminum, black hard anodized
• Dimensions: 1.6″ L x 0.98″ W x 0.95″ H
• Battery Tray: Side loading

Use Case

• Concealed carry
• Subcompact and micro-compact pistols
• Home defense
• Range and training use

Compatibility & Fitment

Slide Cut Required Holosun K footprint. This is a modified RMSc pattern: the rear posts are removed and the front posts are shorter, so the optic drops onto most RMSc and Shield RMSc slide cuts as well as Holosun K cuts. No plate, mount, or riser is included, and none is needed on a compatible cut.

Host Platform Fit Direct mount on the Sig Sauer P365X and P365XL. Slides with a four-boss interface require an adapter plate, sold separately. Check the pistol against Holosun’s fit chart before ordering; optics-ready slide cuts vary between models from the same maker and between production years of the same model.

Iron Sight Co-Witness Not published for this optic. Whether the factory sights co-witness through the window depends on the depth of the slide cut and the height of the sights on that specific pistol; many carry pistols need suppressor-height sights to co-witness with a micro optic. Confirm on the platform before promising it.

Does Not Fit This is a pistol optic and does not mount to a rail. It does not fit Picatinny, Weaver, RMR, ACRO, or Docter footprints, and it will not mount to a full-size RMR-cut slide without an adapter plate.

Compliance & Legal Notes

• No FFL Required: Optics are not firearms; this item ships directly to the buyer with no FFL transfer.
• Export Restricted: Electro-optic sighting devices are subject to U.S. export control. Domestic shipping only; no international orders.
• California Prop 65: This product carries a California Proposition 65 warning (Zanders Prop 65 code A2).
• Buyer Responsibility: The buyer is responsible for confirming this optic is legal in their jurisdiction.

Box Contains

• HS407K-X2 reflex sight
• CR1632 battery
• Adjustment multi-tool
• Lens cloth
• User manual