The ACSS Cyclops is Primary Arms’ CQB-optimized reticle for the 1x MicroPrism. It consists of three elements: a large outer horseshoe that draws the eye to the center of the optic naturally during fast target acquisition; an infinitely precise center chevron for exact shot placement at any range; and a bottom ranging ladder for quickly estimating target distance on known-size targets. In practice, the horseshoe works as your gross aiming reference for fast close-range shots, while the chevron at the center is used for precise aimed fire at distance. The reticle is etched into the glass, so it is present and usable in full detail even when the illumination battery is dead or the optic is turned off.

AutoLive is Primary Arms’ motion-activated power management system. When the optic is in use and moving — as it would be during any active shooting session or weapon manipulation — the illumination stays active at your last setting. When no motion is detected for a set period, the optic enters a low-power sleep state. When motion resumes, it wakes back up automatically. This means you do not have to manually shut the optic off between uses to preserve battery life, and you do not have to remember to turn it on before you need it. At setting 5, the GLx 1x MicroPrism is rated at 14,925 hours of battery life, which translates to years of always-on storage with AutoLive managing power consumption in the background.

The GLx is Primary Arms’ advanced optics tier, while the SLx is their standard performance tier. The GLx 1x MicroPrism features a wider objective lens (20.5mm vs. a smaller diameter on the SLx), an updated internal design with superior glass quality and edge-to-edge clarity, and a slimmer overall profile. The GLx also introduces push button illumination controls and an updated Daylight Bright LED implementation. The GLx is the higher-specification option; the SLx is the more value-oriented entry point in the same platform. Note that because of the GLx’s wider objective lens, it will sit slightly higher than the SLx on compatible mounts such as the Unity Tactical FAST MicroPrism Mount.

The included mounting system uses the MicroPrism footprint and ships with hardware to configure 8 different centerline heights, ranging from approximately 1 inch for AK-pattern rifles and low-comb stocks up to over 2 inches for night vision use or heads-up acquisition preference. The most common centerline heights for AR-pattern rifles are typically in the 1.4" to 1.6" range, which co-witnesses with standard iron sights and provides a consistent cheek weld on mil-spec stocks. If you are running night vision or prefer an elevated heads-up-display style sight picture, the higher configurations are available without purchasing additional parts. Select the height that gives you a natural, consistent cheek weld on your specific rifle and stock combination.

Red dots and holographic sights project an illuminated reticle image using an LED source. Shooters with astigmatism often see this projected dot as a starburst, comet, or smeared blob rather than a clean point, because their cornea distorts the coherent light source. An etched reticle in a prism scope does not have this problem: the reticle is a physical pattern in the glass, not a projected illumination source. What you see through the prism is the reticle lines themselves, which appear with the same sharpness as the rest of the image — your astigmatism affects the entire image equally, so the reticle does not appear worse than the target. This makes prism scopes with etched reticles a common recommendation for shooters who have struggled with standard red dots.

The GLx 1x MicroPrism includes three dedicated NV-compatible illumination levels below the standard daytime brightness range. The Low setting is optimized for very dark environments where any brighter illumination would bloom through a night vision device. The Medium / transitional setting is suited for environments with some ambient light, such as urban operations with streetlights or overcast full-moon conditions. The Flood setting is an IR-mode configuration for use with an IR illuminator and night vision, providing a reticle visible through compatible NVDs. These settings are separate from the 10 standard daylight illumination levels and are accessed by stepping down through the illumination selector below the standard range.