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SKU#HSCQD1 Holosun
In Stock

Holosun Lower 1/3 Co-Witness Dot Sight Mount with Quick Detatch Attachment

2 in stock
Price shown excludes VAT. The applicable VAT rate for your delivery country will be calculated and added at checkout.

The Holosun Lower 1/3 Co-Witness QD Mount is a simple but solid upgrade if you want a reliable way to run your red dot at the right height and still keep backup irons in the picture. It’s built for micro red dots and gives you that lower 1/3 co-witness setup, so your irons sit in the lower part of the window while the dot stays clean and unobstructed up top. The quick detach lever is the real bonus—you can pop the optic on or off fast without tools, and it’ll return to zero when you remount it. Made from tough aluminum with a compact, lightweight design, it’s basically a “fit it once and forget it” mount that keeps your setup flexible without messing up consistency.

-Nathan (Technical Advisor)

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images/assets/pdp-refresh/delivery-clock.svg We aim to dispatch in-stock items to our Ireland-based Logistics Warehouse for EU dispatch within 1-3 working days. images/assets/pdp-refresh/UK-retailer.svg Authorised UK Retailer
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Product Information FIND OUT MORE
DESCRIPTION

Engineered for tactical efficiency and rapid deployment, the Holosun HSCQD1 Red Dot Sight Mount offers shooters a robust and reliable mounting solution for their optics. Designed specifically for use with Holosun T1 Red Dot Sights, this mount is compatible with Picatinny, M1913, and Weaver rails, making it an ideal fit for a wide range of rifles and shotguns.

Crafted from durable 6061 T6 aluminium, the mount features a hard anodised, corrosion-resistant finish that stands up to the rigours of heavy use in demanding environments. Whether you're on the range or in the field, its rugged construction ensures long-lasting performance and consistent alignment.

One of the standout features is the Quick Detach (QD) lever, allowing you to effortlessly attach or remove your optic without tools. This is particularly useful for shooters who need to switch configurations quickly or store their optics separately from the firearm.

The mount includes a spacer to provide a lower 1/3 co-witness height, enabling effective use of backup iron sights in conjunction with your red dot. This setup delivers a clear and unobstructed sight picture, giving you faster target acquisition and improved shooting confidence.

SPECS
  • Mounting Method: Quick Detach (QD) lever

  • Material: 6061 T6 aluminium

  • Finish: Hard anodised, matte black (corrosion-resistant)

  • Rail Compatibility:

    • Picatinny (MIL-STD-1913)

    • Weaver

    • M1913

  • Co-Witness Height: Lower 1/3 co-witness (with included spacer)

  • Optic Compatibility:

    • Holosun T1 Red Dot Sight

    • Holosun 503 series

    • Holosun 403 series

    • Aimpoint T1 footprint and similar micro dot sights

  • Firearm Compatibility: Rifles and shotguns

  • Included Accessories:

    • 1x Co-witness spacer

    • 4x Installation screws

    • 1x Allen wrench

  • Dimensions:

    • Length: 48mm

    • Width: 27mm

    • Height: 30mm

  • Colour: Black

FEATURES
  • 6061 T6 aluminium construction for strength and durability
  • Hard anodised black finish for enhanced corrosion resistance
  • Quick Detach lever for fast, tool-free mounting
  • Lower 1/3 co-witness compatibility with Holosun 503 and 403 series optics
  • Spacer, four installation screws, and Allen wrench included
WHAT'S IN THE BOX
  • Holosun Lower 1/3 Co-Witness Dot Sight Mount with Quick Detatch Attachment
  • 1x Co-witness spacer
  • 4x Installation screws
  • 1x Allen wrench
FREQUENTLY ASKED QUESTION(S)

1. What does lower 1/3 co-witness mean?
It means your iron sights sit in the bottom third of the optic window, while the red dot stays above them for a less cluttered view.

2. What is a QD mount?
QD stands for Quick Detach—it lets you attach or remove the optic without tools in seconds.

3. Will it keep zero after removing it?
Yes, good QD mounts are designed to return to the same position with consistent zero when reattached.

4. What optics does it fit?
It’s made for Aimpoint Micro-style footprints, which includes many Holosun micro red dots.

5. What rail does it use?
It attaches to standard Picatinny (MIL-STD-1913) and similar rails.

6. What material is it made from?
Typically 6061-T6 aluminum with a hard anodized finish for durability and corrosion resistance.

7. Does it need tools to install?
No, the QD lever system is designed for tool-free mounting and removal.

8. Why use lower 1/3 instead of absolute co-witness?
It gives a cleaner sight picture since the irons sit lower in the window instead of blocking the center view.

9. Is it heavy?
No, it’s designed to be lightweight while still strong enough for recoil and hard use.

10. What’s the main benefit of this mount?
It makes swapping or removing your optic quick and easy while keeping your setup consistent, properly aligned, and compatible with backup iron sights.

WARRANTY DELIVERY & RETURNS
Shipping to Europe

Delivery costs & estimated arrival

Find your country below for the delivery charge and how long your order should take to reach you. All orders ship with FedEx. Estimates are in working days and exclude weekends and public holidays.

Country Up to 2kg 2kg – 30kg Estimated delivery
Order under €350 Order €350 & over Order under €350 Order €350 & over
Austria€11.95€26.95€26.95€26.955-7 working days
Belgium€8.95€14.95€14.95€14.954-6 working days
Bulgaria€11.95€31.95€31.95€31.957-9 working days
Croatia€11.95€31.95€31.95€31.956-8 working days
Cyprus€14.95€89.95€89.95€89.95Contact us
Czechia€10.95€21.95€21.95€21.955-7 working days
Denmark€10.95€21.95€21.95€21.954-6 working days
Estonia€11.95€31.95€31.95€31.956-8 working days
Finland€11.95€26.95€26.95€26.955-7 working days
France€10.95€21.95€21.95€21.954-6 working days
Germany€8.95€14.95€14.95€14.955-7 working days
Greece€11.95€31.95€31.95€31.958-10 working days
Hungary€11.95€31.95€31.95€31.955-7 working days
Ireland€6.95€6.95€8.95€8.952-4 working days
Italy€10.95€21.95€21.95€21.955-7 working days
Latvia€11.95€31.95€31.95€31.956-8 working days
Lithuania€11.95€31.95€31.95€31.956-8 working days
Luxembourg€11.95€31.95€31.95€31.955-7 working days
Malta€14.95€89.95€89.95€89.95Contact us
Monaco€10.95€21.95€21.95€21.954-6 working days
Poland€10.95€21.95€21.95€21.955-7 working days
Romania€11.95€31.95€31.95€31.956-8 working days
Slovakia€11.95€31.95€31.95€31.955-7 working days
Slovenia€11.95€31.95€31.95€31.956-8 working days
Spain€11.95€26.95€26.95€26.955-7 working days
Sweden€11.95€26.95€26.95€26.955-7 working days

Returns & withdrawal

Which option you use depends on why you are sending the item back.

Changed your mind?

You have 14 days from receiving your order to withdraw from your purchase. Use our Withdrawal from Contract form to tell us. It is the quickest way, and we will then email you a free returns label.

If you would rather post the item back yourself to our returns address in Ireland, you pay the postage. Full details are on our Returns page.

Withdrawal from Contract

Faulty, damaged or wrong item?

If your item arrived faulty, damaged or not what you ordered, please follow the steps on our Returns page. We cover the cost of returning these items.

Full details of all our return options are on that page.

Returns page

Delivery prices are shown in euros and confirmed at checkout.

EU PRODUCT SAFETY AND COMPLIANCE

Product safety information is available on request from our customer service team.

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