How does the 56mm objective lens and iCONTROL illumination perform during dawn and dusk hunting?

The GPO Spectra 6x 3-18x56i features DoubleHD objective lens technology paired with proprietary GPObright multi-coatings that deliver over 90-92% daylight light transmission, making it exceptionally bright in low-light environments. The steplessly adjustable iCONTROL illuminated reticle enhances visibility against dark targets and includes an automatic shut-off feature and a low-battery alert at 15% remaining power.

Is this riflescope suitable for extensive walk-and-stalk hunting in the Australian bush?

At 830 g, this scope is relatively heavy and is primarily optimised for vehicle-based shooting, blind or dawn and dusk stand hunting, and precision target work. While it handles standard centerfire and magnum recoil with ease, hunters planning extensive walk-and-stalk carry or alpine backpack trips may prefer a lighter 40-44 mm scope weighing 500-600 g to reduce fatigue.

What mounting hardware and accessories are compatible with the GPO Spectra RS660?

The RS660 features a standard 30 mm main tube, requiring standard 30 mm scope rings or mounts for attachment to your firearm receiver. For additional sun glare reduction on bright outback days, you can pair it with compatible accessories such as the GPO 50mm sunshade, or utilise the GPO Spectra Dot High Mount if configuring a modular setup.

Does this optic require any special electrical certifications for use in Australia?

As a passive optical device powered solely by a standard 3V CR2032 coin cell battery for the reticle illumination, the RS660 does not connect to 240V mains power. Consequently, it is exempt from Australian 240V SAA electrical approvals and plug requirements, relying only on standard internal DC electronic compliance.

GPO RS660 Rifle Scope - GPO Spectra RS660

The GPO SPECTRA™ 6x 3-18x56i (BRi Reticle) is a long range hunting riflescope engineered for low-light observation and medium-to-long-range targeting. Featuring DoubleHD objective lens technology and proprietary GPObright multi-coatings, it delivers over 90% daylight light transmission through a massive 56 mm objective lens. The optic is built on a 30 mm main tube and incorporates the illuminated Second Focal Plane (SFP) BRi ballistic reticle powered by an iCONTROL™ illumination system with automatic shutoff, making it optimized for Australian shooters operating in dawn, dusk, and overcast environments.

Key Features

High-Transmission Optical System: Combines a 56 mm objective lens with DoubleHD glass and GPObright coatings for enhanced target clarity during twilight and pre-dawn hours.
iCONTROL™ Reticle Illumination: Powers a steplessly adjustable illuminated ballistic reticle via a single CR2032 battery, featuring a 3-hour auto-shutoff and a 15% remaining battery alert.
PASSIONtrac Turrets: Metric-matched 0.1 MRAD (1 cm at 100 m) click adjustments with tool-free zero-resetting and up to 250 cm (25 MRAD) of total elevation and windage travel.
Side Parallax Focus: Adjustable side-focus turret corrects parallax from 10 metres to infinity for precision shooting across varied distances.
Rugged Housing: Nitrogen-purged, waterproof, and fog-resistant aluminium construction designed to fit standard 30 mm scope rings and withstand centerfire magnum recoil.

Technical Specifications

Magnification: 3–18x (6x optical zoom)
Objective Lens Diameter: 56 mm
Main Tube Diameter: 30 mm
Reticle: BRi (Ballistic Reticle Illuminated), Second Focal Plane (SFP)
Click Value: 0.1 MRAD (1 cm at 100 m)
Total Adjustment Range: 250 cm at 100 m (~25 MRAD elevation and windage)
Field of View (at 100 m): 11.1 m (at 3x) to 1.9 m (at 18x)
Eye Relief: 95 mm
Exit Pupil: 9.5 mm (at 3x) to 3.1 mm (at 18x)
Parallax Adjustment: 10 m to infinity
Length: 360–371 mm
Weight: 830 g
Power Source: 1x CR2032 coin cell battery

Who is the GPO Spectra 6x 3-18x56i for?

Dawn and dusk stand hunters — benefits from the light-gathering capability of the 56 mm objective lens paired with 3-18x magnification, enabling positive target identification in low-light stationary positions.
Long-range pest controllers — utilizes the 250 cm at 100 m total internal adjustment and 0.1 MRAD metric click values on this long range hunting riflescope to dial precise holdovers on distant targets out to 800+ metres.
Precision target shooters — relies on the 10 m to infinity side-focus parallax correction and steady bench-friendly 830 g weight to maintain exact point-of-aim consistency across variable target distances.

Less suitable for: Close-range, fast-paced bush stalking or driven hunts under 50 metres, where a 1-6x LPVO or red dot sight with a wider field of view is better suited; or alpine backpack hunting requiring extended walk-and-stalk carry, where a lighter 40–44 mm riflescope weighing 500–600 g is recommended over this 830 g optic.

SKU	GPO40689LP
Model #	RS660
Brand	Gpo
Shipping Weight	1.0000kg

What our Customers are Saying

Recommended Products

Hawke Vantage Ir 14260 Riflescope 4-16x50 Ao Mil D

$512.95

Zerotech Thrive 1-10x24 G4 Ir Lpvo Illuminated Rif

$498.95

Athlon Neos 3-9x40 Sfp Ir Riflescope With Bdc 500

$395.95

Alpen Apex Xp 5-25x50mm Bdc Target Riflescope With

$1,649.95

Welcome to Xhunter Australia. By accessing and using our website (www.xhunter.com.au) and purchasing from our online store, you agree to be bound by the following Terms and Conditions. Please read them carefully before proceeding.

1. Eligibility

By agreeing to these Terms and Conditions, you confirm that:

• You are at least 18 years of age.
• You are legally capable of entering into a binding contract under Australian law.
• You will not purchase any restricted or controlled items unless legally permitted to do so.

2. Product Information

• All products listed are subject to availability.
• Product descriptions, specifications, and pricing are subject to change without notice.
• We make every effort to display products accurately, although we do not guarantee that all images or content are error-free.

3. Orders and Payments

• All orders are subject to acceptance and confirmation.
• Prices are in AUD and include GST unless otherwise stated.
• We reserve the right to cancel or refuse any order at our sole discretion.
• Full payment is required before dispatch.

4. Authority to Leave (ATL) and Delivery

• By default, all orders are shipped with Authority to Leave (ATL).
• If you require Signature on Delivery, please contact us prior to purchasing. Additional charges apply.
• If an order is returned to us due to failed delivery or non-receipt when ATL is not permitted, a $25 return processing fee must be paid before reshipment or refund.

5. Returns and Refunds

• Please refer to our full Returns Policy on the website.
• Returned items must be in original, resalable condition unless faulty.
• A restocking fee may apply if an item is not in reselling condition.
• Change-of-mind returns may not be accepted for clearance or custom-ordered items.

6. Firearms and Restricted Items

• You must comply with all relevant State and Federal laws for regulated products.
• You are responsible for ensuring proper licences and permits are held.
• We reserve the right to request proof of eligibility before dispatch.

7. Limitation of Liability

• Xhunter Australia is not liable for direct or indirect losses arising from the use or misuse of products.
• We are not responsible for any unauthorised modifications or incorrect application of products.

8. Manufacturer Warranty Support

Some products sold by Xhunter Australia include a manufacturer’s warranty (for example, limited lifetime warranties). These warranties are provided solely by the manufacturer and are separate from the consumer guarantees under Australian Consumer Law.

Where a manufacturer provides a warranty:

A. The warranty is offered and honoured by the manufacturer, not by Xhunter Australia, unless expressly stated otherwise.
B. Customers may be required to contact the manufacturer directly and comply with their warranty process, which may include overseas product assessment.
C. Proof of purchase is required to lodge a manufacturer warranty claim.
D. Assistance provided by Xhunter Australia in lodging warranty claims is a goodwill service only and does not imply liability for warranty outcomes or decisions.

Nothing in this clause limits your rights under Australian Consumer Law.
Xhunter Australia remains responsible for providing legally required remedies for products that fail to meet the consumer guarantees of acceptable quality, fitness for purpose, and reasonable durability.

9. Privacy

Your personal information is collected, used, and stored in accordance with our Privacy Policy.

10. Intellectual Property

All text, graphics, logos, and images on this website remain the property of Xhunter Australia and are protected by copyright laws.

11. Amendments

We may update or modify these Terms and Conditions at any time without prior notice. Continued use of our site constitutes acceptance of any updated Terms.

12. Governing Law

These Terms and Conditions are governed by the laws of Victoria, Australia. Any disputes will be handled exclusively by the courts of Victoria.

13. 18+ Age Requirement

By placing an order, you confirm that you are at least 18 years of age and legally entitled to purchase the products ordered. We may cancel any order that breaches this requirement.

Gpo Rs660 Spectra Rifle Scope 3-18x56i Bri Reticle 30mm Tube

Secure Payment Methods