Primary Arms GLx 1X MicroPrism Scope Red Illuminated ACSS Cyclops Reticle
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The Primary Arms GLx 1X MicroPrism, part 710071, is an unmagnified prism sight with a 20.5 mm objective and the ACSS Cyclops reticle etched into the glass, illuminated in red.
A prism sight resolves its reticle through the same corrected optical path as the target, which is why shooters whose eyes turn an LED dot into a smear or a comet get a clean chevron here instead.
The optic is 2.6 in (66 mm) long and weighs 9.1 oz (258 g), sealed to IP67, with an exit pupil of 18.8 mm and 4.40 in of eye relief. Turrets move in 1/2 MOA clicks with 50 MOA of total elevation and 50 MOA of total windage. Illumination runs from a CR2032 lithium coin cell, which Primary Arms rate at 14,925 hours at setting 5, across 13 brightness settings of which 3 are night-vision compatible, with AutoLive motion sensing to shut the illumination down when the rifle is at rest.
The ACSS Cyclops puts a bold horseshoe around a fine centre chevron, so the eye is drawn to the middle at speed up close while the chevron stays precise further out, with ranging references built into the reticle. Because the reticle is etched rather than projected, it stays usable with the illumination off or the cell flat. The trade-off against a red dot is honest: a prism has a fixed eye relief and an eye box to find, where a reflex sight does not, and it is heavier. Mounting is on the Trijicon Mini-ACOG and Primary Arms MicroPrism pattern.
It mounts on the Trijicon Mini-ACOG and Primary Arms MicroPrism footprint, so a mount cut for either pattern will carry it on a MIL-STD-1913 rail at the height you choose. The same optic is made with green illumination, and the SLx line covers the same ground more cheaply with the SLx 1X MicroPrism ACSS Cyclops Gen II. Our optic mount height guide covers picking the deck height.
| Type | Prism sight, 1x |
|---|---|
| Objective | 20.5 mm |
| Reticle | ACSS Cyclops, glass-etched, red illuminated |
| Illumination | 13 settings (3 night-vision compatible), AutoLive |
| Battery | CR2032, approx. 14,925 hours at setting 5 |
| Adjustment | 1/2 MOA per click, 50 MOA elevation and 50 MOA windage |
| Field of view | 74.8 ft at 100 yards (24.9 m at 100 m) |
| Eye relief | 4.40 in |
| Exit pupil | 18.8 mm |
| Length | 2.6 in (66 mm) |
| Weight | 9.1 oz (258 g) |
| Sealing | IP67 |
| Mount pattern | Trijicon Mini-ACOG / Primary Arms MicroPrism |
| MPN | PA-GLX-1XMP-CYCLOPS |
The answer for an eye that cannot make a red dot behave. Order the GLx 1X MicroPrism 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: Prism Scopes, SLx 1X MicroPrism T-Dot or browse all Primary Arms
| Brand | Primary Arms |
|---|---|
| Part no. | PA-GLX-1XMP-CYCLOPS |
| Category | Rifle Scope |
| Barcode | 818500019473 |
£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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