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Defender-ST
The Vortex Defender-ST is a 1× open-emitter reflex sight offered with 3 MOA or 6 MOA red dots. Vortex documents a top-loading CR2032 battery, battery life up to 25,000 hours, 1 MOA adjustments, motion activation, a 1.48 oz weight, and a DeltaPoint Pro mounting footprint in its official footprint drawing. This is a manufacturer-sourced research record; Known Ground has not marked it as personally tested.
Source-backed record
Research record; not firsthand tested.
9 documented specifications, source references, and verification dates are present. Mounting paths are reviewed separately.
optic
Weight: 1.48 oz
Dimensions: 1.83 in long; 0.38 in / 9.7 mm deck height
Compatibility: DeltaPoint Pro footprint
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Description
The Vortex Defender-ST is a 1× open-emitter reflex sight offered with 3 MOA or 6 MOA red dots. Vortex documents a top-loading CR2032 battery, battery life up to 25,000 hours, 1 MOA adjustments, motion activation, a 1.48 oz weight, and a DeltaPoint Pro mounting footprint in its official footprint drawing. This is a manufacturer-sourced research record; Known Ground has not marked it as personally tested.
Specifications
| Design | Open emitter |
|---|---|
| Battery | Top-loading CR2032 |
| Reticle | 3 or 6 MOA red dot, depending on model |
| Adjustment | 1 MOA per click |
| Eye relief | Unlimited |
| Battery life | Up to 25,000 hours |
| Magnification | 1× |
| Adjustment range | 115 MOA elevation; 145 MOA windage |
| Motion activation | Auto-Shutoff with motion activation |
Sources and verification
- Manufacturer product page
- Specification source — checked August 5, 2026
- Mounting-footprint source — checked August 5, 2026
Reviewed pistol mounting paths
| Pistol configuration | Result | Mounting details | Verified |
|---|---|---|---|
| Glock G19 Gen6 Optic Ready G19 Gen6 Optic Ready · Glock Gen6 Optic Ready | plate required | Glock Glock Gen6 04 Plate (oem) — OEM screws. | Checked July 15, 2026 Not personally tested |
| Staccato Staccato HD P4.5 HOST Staccato HD P4.5 HOST · Staccato HD HOST | plate required | Staccato Staccato HD HOST DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato HD P4 HOST Staccato HD P4 HOST · Staccato HD HOST | plate required | Staccato Staccato HD HOST DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato C2 Optic Ready Staccato C2 Optic Ready (DPO) · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Glock G45 Gen6 Optic Ready G45 Gen6 Optic Ready · Glock Gen6 Optic Ready | plate required | Glock Glock Gen6 04 Plate (oem) — OEM screws. | Checked July 15, 2026 Not personally tested |
| Springfield Armory Echelon 4.5 Echelon 4.5 · Springfield Echelon VIS | direct mount | No plate required — Pin set 3; optic-manufacturer screws. | Checked July 15, 2026 Not personally tested |
| Staccato Staccato HD C3.6 HOST Staccato HD C3.6 HOST · Staccato HD HOST | plate required | Staccato Staccato HD HOST DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato C Optic Ready Staccato C Optic Ready (DPO) · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Glock G17 Gen6 Optic Ready G17 Gen6 Optic Ready · Glock Gen6 Optic Ready | plate required | Glock Glock Gen6 04 Plate (oem) — OEM screws. | Checked July 15, 2026 Not personally tested |
| Walther PDP Full Size — 2.0 Cut PDP Full Size — 2.0 Cut · Walther PDP 2.0 Optic Cut | plate required | Walther Walther PDP 2.0 DPP / Shield Plate (oem) — Use screws specified for the exact optic. | Checked July 15, 2026 Not personally tested |
| Staccato Staccato XL Optic Ready Staccato XL Optic Ready (DPO) · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Walther PDP Compact — 2.0 Cut PDP Compact — 2.0 Cut · Walther PDP 2.0 Optic Cut | plate required | Walther Walther PDP 2.0 DPP / Shield Plate (oem) — Use screws specified for the exact optic. | Checked July 15, 2026 Not personally tested |
| Staccato Staccato XC Optic Ready Staccato XC Optic Ready (DPO) · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato P DPO Staccato P DPO · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato HD C4X HOST Staccato HD C4X HOST · Staccato HD HOST | plate required | Staccato Staccato HD HOST DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Staccato Staccato CS Optic Ready Staccato CS Optic Ready (DPO) · Staccato DPO | plate required | Staccato Staccato DPO DeltaPoint Pro Kit (oem) — Use the exact Staccato DPP/HOST kit instructions and optic-manufacturer screws. | Checked July 16, 2026 Not personally tested |
| Springfield Armory Echelon 4.0C Echelon 4.0C · Springfield Echelon VIS | direct mount | No plate required — Pin set 3; optic-manufacturer screws. | Checked July 15, 2026 Not personally tested |