




SP-K-MOS
Holosun 407/507K Adapter for MOS (2026)
Pairs well with
Overview
Mount your Holosun 407K or 507K red dot sight directly onto any firearm equipped with a Mosquito Optic System (MOS) footprint. This precision-milled adapter ensures perfect alignment, secure attachment, and maintains a consistent cheek weld for rapid target acquisition.
Key Features
- Universal Compatibility: Designed specifically for Holosun 407K and 507K optics on MOS-compatible platforms (primarily Glock pistols).
- Precision Fit: CNC machined for tight tolerances, eliminating wobble and ensuring zero shift after repeated mounting and unmounting.
- Low Profile Design: Maintains a low sight picture for quick draw times and improved ergonomics.
- Durable Construction: Built from high-grade materials to withstand recoil and harsh environmental conditions.
Specifications
| Compatible Optics: | Holosun 407K, 507K |
| Mosquito Footprint: | MOS (Mosquito) |
| Material: | CNC Aluminum Alloy |
| Sku: | K-MOS |
Installation Note
Please ensure your firearm is unloaded before installation. Use the provided screws to secure the optic to the adapter plate. Torque settings should follow manufacturer guidelines for your specific firearm model.
Complimentary shipping & returns

Holosun 407/507K Adapter for MOS (2026)
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
Do I need an account to order?
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When will my order ship?
Orders placed before 15:00 CET on business days ship the same day if the
items are in stock. A tracking e-mail follows automatically.
Can I change or cancel my order?
Yes, e-mail orders@skirmshop.nl or use the contact form before 15:00 CET on the shipping day
with your order number. After dispatch, changes aren’t possible.
Do you ship outside the EU?
Yes, the shipping rates and import taxes will be calculated at checkout.
What is the minimum age to buy an airsoft replica?
Please check your own governments regulations for the minimum required age.
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