How does the side parallax adjustment perform at closer ranges for rimfire or air rifle applications?

The side-adjustable parallax on the GPO Spectra 6x 4.5-27x50i can focus down from 10 yards out to infinity. This allows you to achieve a completely parallax-free image and sharp reticle focus even when shooting at very close targets or out past 1,000 metres with centre-fire rifles.

What rings or mounting hardware do I need to fit this 30mm tube onto an Australian hunting rifle?

This riflescope features a standard 30mm main tube and requires compatible 30mm scope rings. It easily attaches to standard Australian-market Picatinny or Weaver bases. For enhanced height options or specific setups, you can also pair it with accessories like the GPO Spectra Dot High Mount or a 50mm sunshade.

Are there any electrical compliance certifications required for the illumination system in Australia?

No special electrical certifications such as SAA or RCM are required for this scope. It is an optical and mechanical aiming device powered internally by a single replaceable 3V CR2032 lithium battery for the iCONTROL illumination, and it does not connect to 240V mains electricity.

How do the PASSIONtrac turrets prevent accidental adjustments while carrying the rifle through thick outback scrub?

The turrets feature a lift-to-turn locking mechanism paired with a tool-free zero-stop system. This design physically locks the elevation and windage adjustments in place during transit through dense bush, preventing accidental bumps or shifts from altering your zero.

Long Range Riflescope - GPO RSX673

The GPO SPECTRA 6x 4.5–27x50i SFP riflescope is built for extended-range shooting and precision hunting. Featuring a 6x zoom range from 4.5x to 27x magnification, a 50 mm objective lens, and a single-piece 30 mm main tube, this optic delivers clear sight pictures with 92% daylight transmission via DoubleHD multi-coated glass. Adjustments are made using 1/4 MOA counter-clockwise (CCW) lockable turrets integrated with the PASSIONtrac zero-stop system. Built from anodised aluminium, the scope weighs 754 g and includes a side parallax adjustment ranging from 10 yards to infinity.

Key Features

High-Magnification 6x Zoom: Variable 4.5x to 27x magnification suited for fine aiming at small targets and extended distances.
MOAi Illuminated Reticle: Second Focal Plane (SFP) reticle with a fine central microdot powered by an iCONTROL illumination system featuring automatic 3-hour shutoff.
PASSIONtrac Turrets: Lift-to-turn locking elevation and windage turrets with 1/4 MOA click values and approximately 70 MOA total elevation adjustment.
Close-Focus Parallax: Side-focus parallax adjustment dial tracking from 10 yards (9.1 m) to infinity.
Removable Throw Lever: Detachable zoom lever for rapid magnification transitions across the power band.

Specifications

Magnification: 4.5x – 27x
Objective Lens Diameter: 50 mm
Main Tube Diameter: 30 mm
Focal Plane: Second Focal Plane (SFP)
Adjustment Click Value: 1/4 MOA (CCW rotation)
Total Elevation Travel: ~70 MOA
Eye Relief: 95–100 mm
Field of View: 7.6 m – 1.2 m at 100 m
Parallax Adjustment: 10 yd (9.1 m) to infinity
Weight: 754 g
Overall Length: 358 mm
Battery: 1x CR2032

Who is the GPO SPECTRA 6x 4.5–27x50i for?

Long-range varmint hunters — need top-end 27x magnification combined with a 10-yard minimum parallax focus to target small pests from rimfire distances out past 1,000 metres using this long range hunting riflescope.
Medium-to-large game hunters at extended distances — benefit from the 50 mm objective lens and 92% daylight transmission for low-light visibility, paired with precise 1/4 MOA turrets to dial accurate shots at distance.
Target shooters and steel plinkers — utilise the rigid 30 mm main tube offering ~70 MOA of elevation adjustment to track consistent holds on distant steel plates without reticle subtension size changes across the target.

Less suitable for: Dynamic PRS/NRL tactical shooters requiring consistent reticle holdoffs across all zoom levels should select a First Focal Plane (FFP) tactical riflescope. Backcountry stalkers prioritising lightweight carry over high-magnification capability may prefer a compact hunting scope under 754 g.

SKU	GPO40699LP
Model #	RSX673
Brand	Gpo
Shipping Weight	1.0000kg

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Gpo Spectra Rsx673 Riflescope 4.5-27x50 Sfp Moai 30mm

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