Discovery Optics XED 6-36x56 SFIR FFP-Z – a serious tool for precision shooting

The Discovery Optics XED series was developed not by marketers, but based on the real-world requirements of active precision competition shooters. The XED 6-36x56 SFIR FFP-Z is the result of that process: a mature, capable rifle scope equally at home on a PRS stage or a long-range shooting range, performing reliably on high-calibre rifles from .308 Win to .338 Lapua.

XED glass technology – the foundation of image quality

XED stands for Extreme Extra-low Dispersion. The use of Japanese-manufactured ED glass significantly reduces chromatic aberration – by up to 40% according to the manufacturer – resulting in a sharp, true-to-life image even at maximum magnification. The 56mm objective lens, treated with multi-layer anti-reflective coatings, delivers 90% light transmission, providing a reliable image in dawn and dusk hunting or competition conditions.

FFP reticle and Christmas Tree design

The reticle is positioned in the First Focal Plane (FFP), meaning the subtensions remain accurate regardless of the magnification level. The detailed Christmas Tree reticle features extensive holdover and windage markings, allowing fast and precise ballistic compensation at any power setting. The centre point features red illumination, which is particularly useful in low-light conditions.

Zero Stop turrets – fast return to zero

Setting the Zero Stop is straightforward: loosen the set screw, rotate the internal collar to define the zero point, then lock it back in place. From that point, the elevation turret can be dialled up as needed and will always return reliably to the set zero position at the physical stop. Click value is 1/4 MOA, total elevation adjustment range is 120 MOA, and windage adjustment is 62 MOA – one of the key advantages of the 35mm tube over traditional 30mm solutions.

35mm single-piece tube

The 35mm tube, machined from a single piece of aluminium, not only provides greater internal adjustment range but also offers structural rigidity and improved shockproofing. The scope is nitrogen-filled and hermetically sealed, protecting it from fogging, moisture, and extreme temperature changes. The manufacturer specifies 1500G shock resistance, ensuring a stable zero point even on high-calibre rifles.

Side parallax and ergonomics

The side parallax adjustment knob covers a wide range from 40 yards (approx. 37m) to infinity and operates smoothly across its full range according to testers. The magnification ring is easily and quickly managed with the included throw lever – particularly valuable in competition situations. The turret design is operable even with gloves, which is practical for hunters and competitors working in cold conditions.

Generous package contents

The Discovery Optics XED 6-36x56 delivers value not only in the scope itself. The package includes:

• 35mm scope rings – ready to mount immediately
• Sunshade – for protection against lateral light
• Flip caps – for objective and ocular protection
• Throw lever – for quick magnification changes
• Levelling tool – for precise mounting
• Lifetime warranty – as a member of the XED series

Technical specifications

• Magnification: 6–36x
• Objective diameter: 56mm
• Tube diameter: 35mm
• Focal plane: First (FFP)
• Reticle: Christmas Tree, illuminated (IR)
• Click value: 1/4 MOA (MOA version)
• Elevation adjustment range: 120 MOA
• Windage adjustment range: 62 MOA
• Field of view: 5.9m – 0.9m / 100m
• Exit pupil: 9.51–1.54mm
• Eye relief: 9.5–9.3cm
• Parallax focus: 40 yards – infinity
• Length: 425mm
• Weight: 1287g
• Sealing: waterproof, fogproof, shockproof, nitrogen-filled
• Warranty: lifetime warranty

Who is it recommended for?

The Discovery Optics XED 6-36x56 SFIR FFP-Z is primarily recommended for sport shooters and hunters who compete in PRS events, engage in long-range precision shooting, or are looking for a reliable, modern optic for high-calibre rifles. It is an especially strong choice for those seeking professional-level features – FFP reticle, Zero Stop turrets, large adjustment range – without paying the price premium of top-tier European or American brands. The lifetime warranty and generous accessory package further strengthen the scope's value proposition.

What users are saying

The XED 6-36x56 has received consistently positive reception on international forums and in tester reviews. On the precision-rifle.com.au testing site, a detailed evaluation noted that the image quality of the ED glass is "noticeable straight out of the box," with true-to-life colours and sharpness maintained across the field of view. In a 300-metre range test, the optic achieved a 97/100 score, confirming the reliability of the elevation turret and the repeatability of the clicks.

An analysis published on the firearms portal Canadian Operator highlighted the large turret size and smooth parallax adjustment as positives, noting they are "easily adjustable even with gloved hands." The same review did point out some play between clicks on the windage turret – not ideal for a flagship product – though the overall assessment rated the scope's value and performance as outstanding within its price class.

Based on customer feedback collected on the Amazon platform, the scope holds an average rating of 4.87 out of 5 stars. One buyer put it simply: "This scope is awesome. Very clear and bright. On par with much more expensive scopes."