Aim-O M3 Mk4 3.5-10x40 SF Variable Scope with Illumination — Black

The Aim-O M3 Mk4 is a variable magnification scope for hunting and precision shooting, offering 3.5-10x magnification with a 40 mm objective lens, adjustable parallax (Side Focus), and an illuminated reticle. With a 30 mm main tube and an overall length of 344 mm, it sits in the all-round optics category suited to medium and medium-long distances, whether on a hunting rifle or a practical shooting or bench rest platform.

The 3.5x to 10x magnification range covers a wide operational window: at 3.5x the field of view is sufficient for moving targets at close range or in wooded terrain, while at 10x the level of detail allows you to read impacts on a target at extended distance without leaving the scope. This range does not reach the magnifications used for extreme long-range shooting, but it offers genuine versatility for shooters who do not want to swap optics between a hunting outing and a range session.

The Side Focus parallax adjustment lets you eliminate parallax error at every operational distance, which translates to more consistent impacts when eye position shifts between shots. The illuminated reticle, powered by a CR2032 battery, adds visibility in low-light conditions without requiring a separate red dot. The weight of 690 g is in line with a 30 mm tube optic in the 3-10x class: this is not an ultralight scope, but the structural rigidity that accounts for that weight makes it a sound choice on platforms with moderate recoil.

Key points

• The 3.5-10x variable magnification covers distances from woodland to longer-range engagements without changing optics.
• The 40 mm objective gathers enough light for low-light sessions such as dawn and dusk hunting.
• Side Focus allows parallax to be zeroed at any distance, reducing aiming errors when head position is not perfectly consistent between shots.
• The CR2032-powered illuminated reticle keeps the aiming point visible even against bright backgrounds or in shade, without producing enough emission to compromise natural night vision.
• The 30 mm tube provides ample elevation and windage travel for zeroing at varying distances and compensating for differences in mount height.

In the box

• Aim-O M3 Mk4 3.5-10x40 SF scope with illumination