T-Eagle AR 2-12×40 SFIR Rifle Scope — detailed overview

T-Eagle has built a solid reputation in the hunting and sport shooting community over the past decade by offering premium-grade glass and reliable mechanics at highly competitive prices. The AR series is one of the best expressions of this philosophy: mid-sized rifle scopes suited for serious use, without compromise on optical quality or durability.

Optics and image quality

The 2-12×40 SFIR model features a 40mm objective lens that gathers enough light to deliver a clear, sharp image during early morning and evening hunts. Throughout the entire magnification range — from 2x up to 12x — the optical system maintains image sharpness and contrast without distortion or chromatic aberration. The lens coating quality is immediately noticeable: contrast and light transmission exceed what you would typically expect at this price point.

Side parallax and focus adjustment

One of the standout features of the AR 2-12×40 SFIR is its left-side parallax adjustment dial, which allows precise parallax correction from as close as 10 yards. This is particularly valuable for air rifles, rimfire rifles and disciplines requiring close-range accuracy. The side-mounted placement allows fast, comfortable adjustment without changing your shooting position.

Illuminated reticle — 11 brightness levels

The etched glass reticle is arranged in SFP (Second Focal Plane) configuration, meaning the reticle size remains constant on the image as magnification changes — the subtensions do not scale up at higher magnification, which many shooters prefer. The red illumination is adjustable across 11 levels, keeping the reticle clearly visible in both bright sunlight and low-light environments. The illumination unit runs on a CR2032 battery, which is widely available and inexpensive to replace.

Turrets and adjustment range

The click-adjustable turrets operate with a 1/4 MOA click value — approximately 7mm of adjustment per click at 100 yards — enabling precise zeroing and fine corrections. Both windage and elevation offer an adjustment range of ±45 MOA. The turrets use a pull-up locking system: pulled up they rotate freely, pushed down they lock in place, preventing accidental adjustments during field use.

Build quality and durability

The scope is built from a single-piece aluminium tube (one-tube construction), providing excellent structural rigidity. The 30mm tube diameter is a widely adopted standard, compatible with the vast majority of ring mounts and one-piece mounts. The housing is shockproof and waterproof, with nitrogen-purged internals to prevent fogging. At just 675 grams, it adds minimal weight to your setup.

Recommended applications

The AR 2-12×40 SFIR is particularly well suited for:

• Hunting — the 2x low end allows fast target acquisition at close range, while 12x provides sufficient magnification for longer distances
• Sport and field shooting — side parallax and precise turrets make it competition-ready
• Air rifles and rimfire rifles — parallax adjustable from 10 yards makes it optimised for these platforms too
• General-purpose use — for anyone seeking a versatile, outstanding value-for-money optic, it is hard to beat in its class

Key specifications

• Model — AR 2-12×40 SFIR
• Magnification — 2x–12x
• Objective lens diameter — 40mm
• Ocular lens diameter — 32mm
• Tube diameter — 30mm
• Length — 307mm
• Weight — 675g
• Focal plane — SFP (second focal plane)
• Reticle — etched glass, red illumination, 11 levels
• Parallax adjustment — side-mounted, from 10 yards
• Click value — 1/4 MOA
• Adjustment range (elev./wind.) — ±45 MOA
• Field of view — 23°–3.73°
• Dioptre compensation — ±2
• Battery — CR2032
• Turret type — pull-up locking
• Waterproof / Shockproof — yes / yes

The T-Eagle AR 2-12×40 SFIR is a scope that does not need to be treated as a compromise: it delivers reliable optics, practical features and solid build quality at an accessible price.