GPO Ballistic Turret GBT
The GPO Ballistic Turret GBT is a practical upgrade for compatible GPO SPECTRA riflescopes, providing a fast and convenient way to make ballistic adjustments without replacing the entire optic. Designed for shooters who want quick access to distance-based elevation settings, the GBT replaces the standard turret in seconds on compatible SPECTRA models.
The GBT features five superimposed distance rings covering ranges up to 500 metres, allowing you to configure the turret for your preferred ballistic setup. Once properly calibrated, the marked rings provide a straightforward reference for making repeatable distance adjustments.
Quick Ballistic Adjustment
The GPO GBT ballistic turret is designed to simplify reticle ballistic adjustment. The standard turret on compatible SPECTRA riflescopes can be replaced with the GBT quickly, giving you access to a dedicated ballistic turret system.
Its five overlapping rings can be configured for different distances up to 500m, providing a clear reference system for your selected ballistic settings.
Compatible with Existing ZERO-Stop
The ZERO-Stop system already included with compatible SPECTRA riflescopes remains functional with both the standard turret and the GPO Ballistic Turret GBT.
This allows you to retain the benefits of a defined zero position while using the optional ballistic turret.
Lockable Turret Design
The GBT features a lockable turret mechanism designed to help prevent unintended adjustments. This is particularly useful when transporting or handling your rifle and helps keep your selected turret setting secure.
Compatible GPO SPECTRA Riflescopes
The GPO Ballistic Turret GBT is compatible with the following SPECTRA models:
Standard SPECTRA Models
- SPECTRA 8x 1-8x24i
- SPECTRA 8x 1.6-13x44i
- SPECTRA 8x 2-16x50i
SPECTRA Rail Models
- SPECTRA 6x 1-6x24i Rail
- SPECTRA 6x 2-12x50i Rail
- SPECTRA 8x 1-8x24i Rail
- SPECTRA 8x 1.6-13x44i Rail
- SPECTRA 8x 2-16x50i Rail
Important: Compatibility should be confirmed against the exact SPECTRA riflescope model before purchase.
Specifications
| Specification | Details |
|---|---|
| Product | GPO Ballistic Turret GBT |
| Product Type | Ballistic Riflescope Turret |
| Distance Rings | 5 |
| Maximum Distance | Up to 500 m |
| Turret Type | Ballistic Adjustment |
| Lockable | Yes |
| ZERO-Stop Compatible | Yes |
| Compatibility | Selected GPO SPECTRA Riflescopes |
Why Choose the GPO Ballistic Turret GBT?
The GPO Ballistic Turret GBT is designed for users who want a faster and more organised way to manage ballistic elevation adjustments on compatible SPECTRA riflescopes. With five distance rings, settings up to 500 metres, a lockable design, and compatibility with the existing ZERO-Stop system, it provides a convenient upgrade over the standard turret.
Its quick installation and compatibility with multiple GPO SPECTRA riflescope models make the GBT a useful accessory for creating a more personalised optic setup.

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