Holosun KPLT-MOS9MM Adapter Plate

Holosun KPLT‑MOS9MM MOS adapter plate – steel slide mount for 407K/507K micro‑red‑dot sights

The Holosun KPLT‑MOS9MM Adapter Plate is a dedicated mounting plate designed to fit MOS‑pattern pistol slides, enabling direct installation of Holosun 407K and 507K‑series micro‑red‑dot sights. This compact steel plate is engineered to integrate a reflex‑style red‑dot optic into the slide profile while preserving the pistol’s balance and maintaining compatibility with standard holsters. The plate bridges the gap between pistol‑slide mounting cutouts and Holosun’s optic footprint, providing a clean, low‑profile solution for sport shooters, hunters, and outdoor professionals who want fast‑target acquisition without sacrificing ergonomics.

In practical use, the KPLT‑MOS9MM allows you to install a Holosun 407K or 507K red‑dot sight directly onto MOS‑compatible pistols, eliminating the need for additional intermediary mounts or shims. The plate is machined to match commonly used MOS‑9‑mm‑style slide cuts, ensuring a snug, repeatable fit that minimizes play and preserves sight‑zero integrity across shooting sessions. Once the screws are tightened, the optic sits slightly above the slide, yet remains compact enough to avoid interference with the slide stop‑lever or optics‑cover‑plate hardware on most modern MOS‑platform pistols.

Built for long‑term service, this adapter plate is made from hardened steel and finished in black, giving it high resistance to wear, corrosion, and mechanical stress from repeated slide cycling. The compact 48 × 25 × 3 mm dimensions and ~29 g weight add negligible mass to the pistol, so trigger‑hand feel and recoil characteristics remain virtually unchanged. When you want a direct, low‑profile way to mount a Holosun micro‑red‑dot on a MOS‑9‑mm‑type slide, the Holosun KPLT‑MOS9MM Adapter Plate is a solid choice. You can Order the Holosun KPLT‑MOS9MM MOS adapter plate from Holosun Croatia for delivery across the EU with shipping from Split, Croatia to the European Union.

Key Advantages

• MOS‑slide‑dedicated plate: Sized for MOS‑9‑mm‑type slide cuts, providing a direct mounting surface for Holosun 407K/507K optics.
• No extra adapters needed: Lets you attach the red‑dot directly to the pistol slide without stacking plates or shims.
• Steel construction: Hardened steel plate adds durability and long‑term stability under repeated slide cycling and recoil.
• Low‑profile fit: The 48 × 25 × 3 mm footprint keeps the optic close to the slide, preserving holster‑compatibility and slide‑hand‑lever clearance.
• Light weight: At ~29 g, the plate adds minimal mass, so pistol balance and recoil impulse remain practically the same.
• Black finish: Non‑reflective black coating reduces glare and matches common pistol‑slide finishes for a clean, professional look.

Technical Specifications Table Holosun KPLT‑MOS9MM

Frequently Asked Questions

What is the Holosun KPLT‑MOS9MM used for?
The Holosun KPLT‑MOS9MM is a dedicated MOS adapter plate designed to install Holosun 407K‑ and 507K‑series micro‑red‑dot sights directly onto MOS‑pattern platforms. It provides a precise, low‑profile interface between the MOS‑cut surface and the red dot’s footprint, eliminating the need for stacking plates or shims. This makes it ideal for sport shooters and hunters who want a clean, repeatable mounting point for their compact reflex optic on MOS‑compatible setups while maintaining a close tie‑in between the platform and the Holosun red dot sight.

Is the KPLT‑MOS9MM compatible with all micro‑red‑dot sights?
The Holosun KPLT‑MOS9MM is specifically engineered for the Holosun 407K and 507K micro‑red‑dot footprint, so it may not align correctly with other brands or different pattern footprints. Before using it with a non‑Holosun reflex optic, you should verify that the sight’s mounting pattern matches Holosun’s 407K/507K configuration. For a reliable, vibration‑resistant fit, matching the Holosun KPLT‑MOS9MM with the correct Holosun 407K/507K red dot sight ensures stable zero and reduces the risk of shifting under recoil‑like loads.

Does this adapter plate affect durability or zero stability?
The KPLT‑MOS9MM is machined from hardened steel and finished in black, giving it high resistance to mechanical stress, wear, and slide‑mount‑cycle effects. Its precise 48 × 25 × 3 mm cut‑in fit minimizes flex and play, helping maintain the red dot sight’s zero during repeated use and transport. When paired with a Holosun 407K/507K red dot sight, the plate contributes to a rigid, compact assembly that is well suited for sport‑shooting stages and field‑oriented use where durability and long‑term stability matter.

How does this plate influence the Holosun 407K/507K’s reticle and aiming performance?
The KPLT‑MOS9MM adapter plate does not alter the Holosun 407K/507K’s internal reticle system; it simply positions the red dot sight at the correct height and footprint on the MOS cut. The reflex‑optic reticle, whether red dot or green dot models, operates as designed, with the same dot size, brightness settings, and MRS‑style references depending on the specific Holosun micro‑red‑dot model. By ensuring a tight, flush fit, the plate helps maintain consistent eye alignment and centering, which improves aiming accuracy and supports faster target acquisition in both sport‑shooting and hunting‑style scenarios.

What is the difference between using a red dot and a green dot on the 407K/507K?
Both the red dot and green dot versions of the Holosun 407K/507K are reflex optics, but the green dot tends to appear brighter and more visible in daylight and certain low‑light conditions, while the red dot can be more discreet in darker environments. Green dot sights usually offer higher contrast against complex backgrounds, making them popular for sport‑shooting stages with mixed light. Red dot variants are often preferred for long‑duration viewing where eye strain is a concern. In practice, both perform well on the MOS‑pattern platform via the KPLT‑MOS9MM, so the choice often comes down to personal preference and ambient‑light conditions.

How does Holosun Croatia’s official EU warranty work with this plate?
The Holosun KPLT‑MOS9MM is sold by Holosun Croatia, an official EU‑based authorized Holosun dealer, and while the plate itself is a passive mounting component, it is supplied under the same EU‑channel quality control and support ecosystem as Holosun optics. If you encounter manufacturing defects or quality issues, Holosun Croatia handles communication with Holosun and coordinates inspection, replacement, or further technical support under European‑market terms. This official EU warranty framework ensures timely service and documentation in both Croatian and English, giving European sport shooters and hunters confidence in their accessory purchases.

Is the KPLT‑MOS9MM suitable for hunting and sport‑shooting use in Europe?
Yes, the Holosun KPLT‑MOS9MM MOS adapter plate is well suited for sport‑shooting and hunting‑style optics setups in Europe. Its low‑profile, compact design preserves the reflex‑optic platform’s balance and fits neatly on MOS‑9‑mm‑type carriers, while the steel construction withstands mechanical stress from frequent use. When used with a Holosun 407K/507K micro‑red‑dot sight, the combination delivers a reliable, fast‑acquisition aiming solution for close‑ to medium‑range stages and field‑oriented applications, making it a practical choice for European sport shooters and hunters who value long‑term durability and consistent performance.

Do I need extra mounting hardware when using the KPLT‑MOS9MM?
The Holosun KPLT‑MOS9MM kit includes the steel adapter plate and matching mounting screws, so you typically do not need additional hardware to install it on a compatible MOS‑cut platform. These screws are designed to secure the plate firmly into the MOS‑pattern surface, creating a stable base for the Holosun 407K/507K red dot sight. However, if you plan to swap or re‑zero frequently, using a torque‑limiting screwdriver and a small amount of thread‑locking compound can further enhance long‑term zero stability without altering the plate’s compatibility with the reflex optic or the MOS‑mounting standard.