Primary Arms SLx 3X MicroPrism™ - Red Illuminated ACSS Griffin X MIL Reticle

Primary Arms SLx 3x MicroPrism (with ACSS® Griffin X MIL Reticle)

This Primary Arms MicroPrism is part of the acclaimed SLx optics line, which has earned a strong reputation for innovation, reliability, and value. Every SLx optic undergoes rigorous field testing during development to ensure it performs in any environment.

The SLx 3x MicroPrism is a cutting-edge optical system that combines the ultra-compact, lightweight design of a microdot sight with the durability and precision of a fixed 3x magnified optic. This model includes 13 total illumination settings, including 3 night vision-compatible levels, and is equipped with AutoLive® motion-sensing on/off technology to preserve battery life without sacrificing readiness.

Weighing less than 8 oz and measuring only 2.95” in length, the SLx 3x MicroPrism is smaller and lighter than many red dot sights. Despite its size, it delivers crystal-clear glass with 3x magnification, improving precision for mid-range engagements. Its wide field of view (38.0 ft @ 100 yds) and generous 2.7" eye relief make it easy to acquire and track targets—even in close-quarters scenarios.

The etched reticle, combined with an adjustable diopter, ensures a crisp sight picture under any condition—even for shooters with severe astigmatism. The reticle remains visible without illumination and is daylight-bright at the highest settings, making it highly versatile for various lighting environments.

This optic comes with a ruggedized mounting system using the industry-standard mini prism footprint, offering outstanding zero retention and durability under heavy use. It supports eight different mounting heights and configurations, ensuring compatibility with virtually any rifle setup.

Additional features include a CR2032 battery (included) providing up to 29,000 hours of runtime on medium settings, lens covers, and compatibility with optional anti-reflection devices (ARDs). Like all SLx optics, it is backed by the Primary Arms Lifetime Warranty.

ACSS® Griffin X MIL Reticle

The ACSS® Griffin X MIL reticle is part of the patented Advanced Combined Sighting System (ACSS®)—a high-performance reticle design that simplifies complex ballistics into intuitive visual tools. ACSS reticles are known for their real-world effectiveness, combining elements like ballistic drop compensation, auto-ranging stadia, wind holds, moving target leads, and precise aiming points.

Specifically, the ACSS Griffin X MIL is a compact, MIL-based reticle engineered for precision and adaptability. It features a full MIL grid, offering 10 MILs of elevation holdovers and 4 MILs of wind holds on each side. The 5th and 10th MIL marks are highlighted with barbell-shaped brackets for fast, repeatable aiming references—ideal for engaging targets at variable distances.