First Focal Plane Optical System
The DISCOVERYOPT HD GEN III 5-30x56 FFP MRAD rifle scope combines a 5-30x magnification range with a first focal plane reticle, a 56 mm outside objective diameter and a 34 mm main tube. The reticle changes scale with magnification, keeping its subtensions consistent throughout the zoom range. Red illumination is available in six brightness settings.
Fully Toolless Zero Stop
The defining control feature is the fully toolless zero-stop turret. The MRAD adjustment system uses 0.1 MRAD clicks, with 35 MRAD of elevation travel and 19 MRAD of windage travel. The zero-stop function provides a defined return point after dialling, while its toolless format removes the need for a separate tool when setting the stop.
Parallax Field of View and Eye Relief
Parallax adjustment runs from 15 yards to infinity. The field of view is 25 to 4 feet at 100 yards, and eye relief is 3.2 to 3.1 inches.
Construction and Mounting
The scope measures 386 mm in length and weighs 1,115 g. Its housing is rated IP67 waterproof, nitrogen purged for fog resistance and carries a .50 BMG recoil rating. A CR2032 battery powers the illuminated reticle.
The 34 mm main tube requires 34 mm rings. Use a torque wrench during mounting, tighten the ring screws in a cross pattern and apply 15 to 18 in-lb to the ring screws before zeroing.
Technical Specifications
| Specification |
Value |
| Brand |
DISCOVERYOPT |
| Model |
HD GEN III 5-30X56SFIR |
| Product type |
First focal plane MRAD rifle scope |
| Magnification |
5-30x |
| Outside objective diameter |
56 mm |
| Focal plane |
First focal plane |
| Main tube diameter |
34 mm |
| Illumination |
Red with six brightness settings |
| Turret function |
Fully toolless zero stop |
| Click value |
0.1 MRAD |
| Elevation adjustment range |
35 MRAD |
| Windage adjustment range |
19 MRAD |
| Field of view |
25-4 ft at 100 yd or 7.6-1.2 m at 100 yd |
| Eye relief |
3.2-3.1 in or 8.0-7.8 cm |
| Parallax |
15 yd to infinity |
| Length |
386 mm or 15.2 in |
| Weight |
1,115 g or 39.3 oz |
| Waterproof rating |
IP67 |
| Fog resistance |
Nitrogen purged |
| Recoil rating |
.50 BMG |
| Battery |
CR2032 |
Package Contents
HD GEN III 5-30X56SFIR rifle scope x1; Spec card x2; User manual x1; Scope sunshade x1; Lens cleaning cloth x1; Warranty card and QC card x1; Lens cap x1.
Installation Use and Care
- Use 34 mm scope rings; 30 mm rings are not compatible with the 34 mm main tube.
- Follow the firearm and ring manufacturers' mounting instructions and use a torque wrench.
- Apply 15 to 18 in-lb to the ring screws to reduce the risk of tube damage.
- Tighten the ring screws in a cross pattern for even clamping before zeroing.
- Confirm that the scope is securely mounted and correctly zeroed before use.
- Fit a CR2032 battery with the correct polarity when illumination is required.
- Keep lens surfaces clean with suitable optical cleaning materials and store the scope dry when not in use.
Frequently Asked Questions
Which adjustment system does this product use?
The product uses an MRAD adjustment system with 0.1 MRAD clicks.
What does fully toolless zero stop mean?
The zero-stop mechanism can be set without using a separate tool, providing a defined return point after dialling.
Is the reticle first focal plane?
Yes. The reticle is positioned in the first focal plane and changes scale with magnification.
Does the reticle illuminate?
Yes. It has red illumination with six brightness settings and uses a CR2032 battery.
What is the parallax adjustment range?
Parallax adjustment runs from 15 yards to infinity.
Which scope rings are required?
The 34 mm main tube requires 34 mm scope rings.
What is included in the box?
The box contains the scope, two spec cards, one user manual, one sunshade, one lens cleaning cloth, one warranty and QC card, and one lens cap.
