Collimator Primary Arms SLx 3x Micro Prism iR Red ACSS Raptor 5.56/.308 Yard FDE

SLx prism scopes combine the speed of red dots with the precision of magnified optics and a compact form factor. That’s why they are popular not only among users with astigmatism but also among shooters looking for a versatile optic for short- to medium-range engagements.

The American brand Primary Arms, known for its high-quality optics, red dots, prism scopes, and shooting accessories, has rapidly conquered the U.S. market with an excellent price-to-performance ratio. Most of its products come with a lifetime warranty, highlighting the company’s confidence in their reliability. Primary Arms is also famous for its proprietary ACSS reticle, allowing even beginner shooters to improve their accuracy quickly.

Primary Arms — American shooting optics with a lifetime warranty

Features of the Primary Arms SLx 3x Micro Prism ACSS Raptor 5.56/.308 FDE yard:

• Compact size and lightweight construction;
• multi-coated optics for enhanced light transmission;
• patented ACSS Raptor reticle calibrated for 5.56 and .308 ammunition with yard-based markings;
• long 69 mm eye relief providing a generous eyebox for comfortable head positioning;
• 12.6 m / 100 m field of view for tracking moving targets;
• Daylight Bright illumination for use under bright sunlight;
• 13 daylight brightness settings + 3 night vision modes;
• fast-focus eyepiece for quick reticle adjustment;
• red illuminated reticle;
• sealed IP67 aluminum housing resistant to fog, water, and shock;
• tactile 0.25 MOA turret clicks for easy zeroing;
• long battery life – up to 29,000 hours (CR2032 at medium brightness);
• AutoLive motion sensor technology for automatic on/off control;
• eight mounting height options including Absolute Co-witness and Lower 1/3;
• lightweight build – only 225 g with high mount;
• etched glass reticle ideal for users with astigmatism, works even without illumination;
• wide adjustment range – up to 80 MOA (elevation and windage);
• multi-layer anti-reflective lens coatings;
• hard-anodized matte finish for glare reduction;
• includes reinforced Picatinny mount and flip-up lens covers;
• military FDE (Flat Dark Earth) color scheme;
• lifetime manufacturer warranty.

Primary Arms SLx 3X MicroPrism is a compact 3× prism scope from the renowned SLx line, known for reliability, innovation, and great value. During field tests, Primary Arms optics were tested on the SCAR 17 (.308 Win) rifle — over 7,000 rounds fired without loss of zero. This model features the upgraded ACSS Raptor 5.56/.308 reticle etched on premium low-dispersion glass and a reinforced mounting base ensuring rigidity and consistent alignment.

The SLx 3x provides fast target identification at medium distances and allows both-eyes-open shooting for close-range engagements. Unlike traditional red dots, prism scopes with magnification feature BDC reticles and deliver a parallax-free image with superior precision and situational awareness.

Primary Arms SLx 3X MicroPrism — the perfect optic for shooters with astigmatism

The durable IP67-rated aluminum body provides full resistance to fog, moisture, and impacts. The long 69 mm eye relief and spacious eyebox ensure quick sight acquisition even without perfect alignment. This makes the SLx 3x ideal for dynamic shooting and moving targets. The ACSS Raptor 5.56/.308 reticle is laser-etched on glass and visible even without illumination. The red illumination (horseshoe and chevron) offers 13 daylight and 3 night vision settings. The AutoLive motion sensor extends battery life up to 29,000 hours by automatically turning the illumination off when idle and instantly reactivating it upon movement.

ACSS Raptor is Primary Arms’ proprietary reticle calibrated for 5.56 / .308 ballistics. It features a central chevron surrounded by a bold horseshoe, with a ranging scale below for distance estimation and precise holds. This intuitive design makes it perfect for fast close-range and accurate mid-range shooting. The reticle is metric-based for easier use in European conditions.

The SLx 3X MicroPrism comes with a rugged aluminum mount reinforced with steel hardware for a stable, repeatable zero. Optional spacers are available to achieve eight different mounting height configurations.