The Holosun KPLT-MOS9MM is a genuine Holosun adapter plate that mounts a K-footprint optic — the 407K X2, 507K X2, EPS or EPS Carry — onto Glock MOS optics-ready slides in 9mm, including the G17, G19, G34 and G45 MOS. Both sets of screws, plate-to-slide and optic-to-plate, are supplied with the plate.
K-footprint optics use the compact RMSc pattern, which is narrower than the RMR pattern most factory optic cuts are machined for. This plate is the part that bridges the two, so a small enclosed or open sight can sit correctly on a full-size slide.
How It Compares
For a CZ P-10 C host use the KPLT-CZP10C plate, for an FN 509 use the KPLT-FN509 plate, and for an RMR-cut slide use the KPLT-507C plate. If your optic is a 509T rather than a K-series, the 509PLT-MOS9MM plate is the right part. Our Glock MOS optic fitting guide walks through the whole job.
Ideal For
- Airsoft gas blowback pistol builds on a Glock MOS slide
- Section 1 long-barrelled pistols and revolvers built on a Glock MOS pattern
- Licensed pistol setups in Northern Ireland and target work overseas
- Moving a small K-series optic between hosts without re-machining a slide
Key Features
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Optic Footprint: Holosun K footprint, the RMSc pattern used by 407K, 507K, EPS and EPS Carry
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Host: Glock MOS optics-ready slides (9mm models)
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Hardware: plate-to-slide and optic-to-plate screws supplied
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Build: genuine Holosun part, machined to Holosun's own tolerances
Technical Specifications
| Optic Footprint |
Holosun K footprint / RMSc pattern (407K, 507K, EPS, EPS Carry) |
| Fits |
Glock MOS optics-ready slides, 9mm models |
| Hardware |
Mounting screws included (plate-to-slide and optic-to-plate) |
| MPN / UPC |
KPLT-MOS9MM / 810047071136 |
What's Included
- Holosun KPLT-MOS9MM mounting plate
- Plate-to-slide and optic-to-plate mounting screws
Warranty
Covered by Holosun's manufacturer warranty, handled in the UK by Xtreme Tactical.
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Holosun's warranty.
Frequently Asked Questions
Which optics does the Holosun KPLT-MOS9MM plate fit?
The Holosun KPLT-MOS9MM plate fits optics with the Holosun K footprint, which is the RMSc pattern. That covers the 407K X2, the 507K X2, the EPS and the EPS Carry. It does not fit RMR-footprint optics such as the 507C or 407C, and it does not fit the 509T rear-lug footprint.
Which slides does the Holosun KPLT-MOS9MM plate fit?
The Holosun KPLT-MOS9MM plate fits Glock MOS optics-ready slides in 9mm that use Glock's standard MOS plate system, including the G17, G19, G34 and G45 MOS.
Is the K footprint the same as RMSc?
Yes. Holosun's K footprint is the RMSc pattern, the compact two-screw footprint originated by Shield and used across the industry for small pistol optics. Our RMR versus RMSc footprint guide explains the difference in full.
Are the mounting screws included with the Holosun KPLT-MOS9MM?
Yes. The Holosun KPLT-MOS9MM is supplied with both sets of screws — those that fix the plate to the slide, and those that fix the optic to the plate.
