Holosun HS507C X2 Red Dot Sight ACSS Vulcan Reticle Solar Failsafe
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The Holosun HS507C X2 ACSS, part HS507C-X2-ACSS, is a 1x open reflex pistol sight on the Holosun 507C and Trijicon RMR footprint, carrying the Primary Arms ACSS Vulcan reticle behind a 0.91 x 0.63 in window.
A round dot makes you choose between coarse and fine. The Vulcan does not: the circle drags your eye to the middle at speed, and the tip of the 10 MOA chevron gives you a finer point to hold with when the target is further out.
Underneath the reticle this is standard 507C X2 hardware. The housing is 7075-T6 aluminium in a hard anodised black finish, 1.78 x 1.15 x 1.15 in and 1.5 oz (43 g), rated IP67 for water and dust and tested to 5000G. A CR1632 loads from a side tray, backed by Solar Failsafe and Shake Awake for a rated 50,000 hours, and windage and elevation move in 1 MOA per click across 50 MOA either way. Twelve brightness levels split ten daylight and two for night vision.
The reticle is fixed. There is no switching to a plain dot on this version, which is the point of buying it — you get one picture and you learn it. If you would rather choose between a dot, a circle and both, the standard HS507C X2 with the Multi-Reticle System is the one to have instead. As an open reflex the emitter channel is exposed, so it wants an occasional wipe in rain or dust, and it fits any slide or mount cut for the RMR pattern.
Any RMR-cut slide takes it, as does an optics-ready pistol supplied with an RMR-pattern plate, and on a carbine it suits any RMR-footprint mount. If you want the switchable reticle instead, that is the HS507C X2 MRS, and the newer generation is the HS507C X3. The same ACSS Vulcan reticle on a narrower slimline footprint is the HS507K X2 ACSS.
| Type | Open reflex pistol red dot sight, 1x |
|---|---|
| Reticle | ACSS Vulcan — 10 MOA red chevron in a guidance circle |
| Footprint | Holosun 507C / Trijicon RMR |
| Window | 0.91 x 0.63 in (23.1 x 16.0 mm) |
| Illumination | 12 settings — 10 daylight, 2 night vision |
| Adjustment | 1 MOA per click, ±50 MOA |
| Battery | CR1632 in a side-loading tray, up to 50,000 hours |
| Power | Solar Failsafe and Shake Awake |
| Dimensions | 1.78 x 1.15 x 1.15 in (45.2 x 29.2 x 29.2 mm) |
| Weight | 1.5 oz (43 g) |
| Housing | 7075-T6 aluminium, hard anodised black |
| Water resistance | IP67 |
| Vibration rating | 5000G |
| Brand | Holosun |
| MPN | HS507C-X2-ACSS |
One reticle, learned once, that works close in and further out. Order the HS507C 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: RMR Footprint Red Dot Sights, HS507COMP Competition or browse all Holosun.
| Brand | Holosun |
|---|---|
| Part no. | HS507C-X2-ACSS |
| Category | Red Dot Sight |
| Barcode | 810047071143 |
£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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