Holosun HE507K X2 Green Dot Sight ACSS Vulcan Reticle
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The Holosun HE507K X2 ACSS is a compact open-reflex green dot sight on Holosun's K footprint, carrying the ACSS Vulcan reticle — a chevron aiming point inside a large guidance circle.
The circle pulls your eye to the middle of the window and the chevron tip gives you something finer than a dot to aim with. That combination is why the Vulcan has a following.
The aluminium housing measures 1.6 x 0.98 x 0.95 in (40.6 x 24.9 x 24.1 mm) and weighs 1.0 oz (28 g), rated IP67 for water and dust and tested to 5000G. A CR1632 sits in a side-loading tray, rated up to 50,000 hours, and Shake Awake with last-setting recall means it comes back on where you left it.
Twelve brightness levels cover ten daylight settings and two that work under night vision, with 1 MOA clicks and 30 MOA of travel each way. Two things to be clear about: the emitter is open rather than sealed, and this is the K footprint, so an RMR-cut mounting needs the C-series version of the same optic instead.
It fits mountings cut to the Holosun K pattern. The switchable circle-dot version on the same footprint is the HE507K X2 with the Multi-Reticle System, the full-size ACSS Vulcan option is the HE507C X2 ACSS, and other green emitters are in green dot sights.
| Type | Open-reflex green dot sight, 1x |
|---|---|
| Reticle | ACSS Vulcan — chevron inside a guidance circle |
| Reticle colour | Green |
| Footprint | Holosun K footprint |
| Illumination | 10 daylight and 2 night vision settings |
| Adjustment | 1 MOA per click, 30 MOA travel |
| Battery | CR1632 side-loading tray, up to 50,000 hours |
| Power management | Shake Awake with last-setting recall |
| Dimensions | 1.6 x 0.98 x 0.95 in (40.6 x 24.9 x 24.1 mm) |
| Weight | 1.0 oz (28 g) |
| Housing | Aluminium, IP67, 5000G |
| MPN | HE507K-GR-X2-ACSS |
A chevron and a guidance circle in green, on an optic that weighs an ounce. Order the HE507K X2 ACSS today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Green Dot Sights, HE507K X2 Multi-Reticle System or browse all Holosun
| Brand | Holosun |
|---|---|
| Part no. | HE507K-GR-X2-ACSS |
| Category | Red Dot Sight |
| Barcode | 810047072409 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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