Primary Arms SLx 4.5-27x56

Primary Arms SLx 4.5-27x56 FFP Product Description

Long-Range Magnification: The 4.5–27x magnification range delivers high precision for long-range shooting, allowing accurate target identification and shot placement at extended distances.

First Focal Plane System: The reticle scales with magnification, ensuring consistent holdovers, wind corrections, and ranging accuracy at all zoom levels.

ACSS Reticle Options: Available with illuminated ACSS Athena BPR MIL and ACSS Deka G2 reticles, providing advanced ballistic solutions for precision shooting. 

56 mm Objective Lens: The large, fully multi-coated objective lens enhances light transmission and image clarity, supporting effective use in various lighting conditions. 

Precision Turret System: Features 0.1 MRAD tactical turrets with tactile clicks and an Easy Stop zero-stop system for reliable and repeatable adjustments. 

34 mm Main Tube: The 34 mm tube allows for increased internal adjustment range, offering up to 32 MRAD of elevation travel for long-range shooting. 

ABOUT THE SERIES

The Primary Arms SLx series represents the brand’s mid-tier optics line, combining versatility, modern design, and proven functionality across a broad spectrum of shooting applications.

Defined by its wide-ranging portfolio, the SLx lineup includes low-power variable optics, mid- and high-magnification riflescopes, as well as prism and micro optics.

Other models in the SLx series include:

• Primary Arms SLx 1–6x24
• Primary Arms SLx 1–8x24
• Primary Arms SLx 1–10x28
• Primary Arms SLx 2–12x40
• Primary Arms SLx 3–18x50
• Primary Arms SLx 4–16x44

With its focus on practical innovation—most notably the ACSS reticle system—alongside reliable mechanics and accessible pricing, the SLx series is engineered for shooters who demand adaptability and performance in real-world conditions.

ABOUT THE MODEL Primary Arms SLx 4.5–27x56 FFP

This model represents the high-magnification precision option within the SLx lineup, designed for long-range shooting, target work, and demanding field applications.

It features a 34 mm tube, 4.5–27x magnification range, illuminated first focal plane ACSS reticle, side parallax adjustment, and configurable tactical turrets with zero-stop functionality.

Key specifications include approximately 8.9–1.48 m/100 m field of view, ~102 mm eye relief, 0.1 MRAD click adjustments, 32 MRAD elevation travel, ~925 g weight, and ~350 mm length. 

It is intended for shooters seeking a capable long-range optic with advanced reticle systems and reliable mechanical performance.

ABOUT THE MANUFACTURER

Primary Arms is a US-based optics manufacturer known for delivering high-value riflescopes and innovative reticle systems. Its ACSS reticle technology is widely recognized for simplifying ballistic calculations and improving practical shooting performance.

MAIN FEATURES

• Magnification: 4.5–27x
• Objective Lens Diameter: 56 mm
• Tube Diameter: 34 mm
• Reticle: ACSS Athena BPR MIL / ACSS Deka G2 (Illuminated, FFP)
• Field of View: ~8.9–1.48 m/100 m
• Eye Relief: ~102 mm
• Adjustment: 0.1 MRAD clicks
• Elevation Travel: 32 MRAD
• Illumination: 6 brightness settings
• Length: ~350 mm
• Weight: ~925 g
• Color: Black
• Durability: waterproof, fogproof, shock-resistant

WARRANTY

10-year warranty covering material and manufacturing defects under normal use.

IN THE BOX

• Riflescope
• Battery (CR2032)
• User manual