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Primary Arms SLx 1X MicroPrism PA-SLX-1XMP-CYCLOPS (Red Illuminated ACSS Cyclops Gen II Reticle version).
This is an ultra-compact 1x prism sight from Primary Arms' SLx series, designed as a rugged, astigmatism-friendly alternative to traditional red dots. It delivers the speed of a 1x optic in a micro-sized housing (about half the size of Primary Arms' Compact 1x Prism and over 20% lighter) while offering an etched reticle that remains visible even with illumination off or battery dead. The ACSS Cyclops Gen II reticle combines a large 65 MOA horseshoe for fast close-range acquisition with a precise center chevron and built-in ranging/holdover features for quick engagement out to several hundred yards. It's ideal for AR-15s, carbines, PCCs, or any build where minimal size/weight and reliability matter.
Key Features & Specs
- Magnification: True 1x (no magnification distortion).
- Reticle: Etched ACSS Cyclops Gen II with red illumination. Features a bold 65 MOA horseshoe surrounding a chevron aiming point, plus ranging brackets and holdovers calibrated for 5.56/.223 (with some versatility for other calibers). Partial illumination (center chevron/horseshoe elements light up).
- Illumination: 13 brightness settings (including true daylight bright) + 3 night vision compatible settings (Low, Med, Flood). AutoLive® motion-sensing technology automatically turns illumination on when the optic moves and off after inactivity to save battery. Powered by a single CR2032 battery (~29,000+ hours life on medium setting).
- Optics: Advanced prism system with excellent glass clarity, wide field of view (~76–78+ ft at 100 yards depending on exact listing), and large 15.6 mm exit pupil for forgiving eye position. Broadband anti-reflective coatings.
- Adjustments: 1 MOA click value. Total travel: 120 MOA elevation / 120 MOA windage.
- Mounting: Includes a versatile mount with 8 different height/configurations (supports absolute co-witness, lower 1/3, and other options). Compatible with Trijicon Mini-ACOG footprint mounts and Primary Arms MicroPrism mounts. Allows use of backup iron sights or magnifiers behind it.
- Build Quality: Hardcoat anodized aluminum housing. Shock-resistant, fogproof, waterproof (IP67 rating). Diopter adjustment for reticle focus. Eye relief: ~3.6 inches (forgiving for a prism).
- Size & Weight: Extremely compact — Length: 2.48 inches (63 mm). Weight: 7.6 oz (216 g) with included mount/riser; 5.5 oz (156 g) without riser.
- Additional: Lifetime warranty from Primary Arms. Etched reticle works without power (perfect for astigmatism sufferers). No parallax issues typical of some red dots.
The MicroPrism shines as a "better red dot" for users who want etched reticle durability, built-in BDC/ranging in the reticle, and a tiny footprint without the bloom or starburst common with red dots on astigmatic eyes. Real-world feedback praises the clear glass, intuitive ACSS reticle for fast hits, long battery life with AutoLive, and how well it co-witnesses or pairs with magnifiers (like the SLx Micro 3x). Some note the eyebox is usable but requires consistent cheek weld for the best view.
Who It's For
- AR-15 / carbine owners wanting a compact, reliable 1x optic with ranging capability.
- Shooters with astigmatism who struggle with red dots.
- Tactical, home defense, competition, or general range users prioritizing speed + precision in a lightweight package.
