B
b00st3824good upgrade
Reviewed on April 8, 2026Verified with Build
solid optic. battery cap threading is a bit rough
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Vortex Defender-ST 3MOA Micro Red Dot w/ Delta Point Pro Footprint - DFST-MRD3
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Vortex Optics
Overview
The Vortex Defender-ST 3MOA Micro Red Dot is a compact red dot sight designed to enhance your accuracy with its 3 MOA dot size, providing a precise aiming point for quick target acquisition. It features a Picatinny mounting interface, making it easy to attach to a variety of rail systems, while the red reticle color ensures visibility in different lighting conditions. This optic is commonly found on builds with a mid-length gas system and chambered in 5.56 NATO, making it a solid choice for those looking for reliable performance in tactical and competitive scenarios.
Specifications
MPNDFST-MRD3
Reticle ColorRed
ColorBlack
Mounting InterfacePicatinny
Dot Size3 MOA
Optic TypeRed Dot
Vortex Defender-ST 3MOA Micro Red Dot w/ Delta Point Pro Footprint - DFST-MRD3
Frequently Built With
Based on build data
Weaver Multi-Slot Base - 48400
Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger
Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock
Streamlight ProTac Rail Mount HL-X Laser 1000 Lumen Weapon Light with Tape Switch - CR123A
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
Strike Industries Extended Bolt Catch
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
50%
AR-1550%
AR-950%
CaliberBased on real build data showing which calibers builders choose alongside this product.
50%
5.56 NATO50%
9mm50%
| Product | Category | Times Built Together |
|---|---|---|
| Weaver Multi-Slot Base - 48400 | 46 | |
| Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger | 44 | |
| Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock | 35 | |
| Streamlight ProTac Rail Mount HL-X Laser 1000 Lumen Weapon Light with Tape Switch - CR123A | 30 | |
| Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011 | 28 | |
| Strike Industries Extended Bolt Catch | 28 |
| Platform | Percentage |
|---|---|
| AR-15 | 50% |
| AR-9 | 50% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 50% |
| 9mm | 50% |
Builds Featuring This Part
See all 10 →Builds in the community that include the Vortex Defender-ST 3MOA Micro Red Dot w/ Delta Point Pro Footprint - DFST-MRD3
| Build | Parts | Total |
|---|---|---|
 | 30 | $6451.34 |
 | 27 | $4140.46 |
 | 14 | $4685.94 |
| 14 | $2437.02 |
 | 8 | $1232.77 |
 | 15 | $4223.46 |
 | 15 | $2501.29 |
| 19 | $4981.37 |
 | 19 | $2612.81 |
 | 28 | $3508.60 |
Customer reviews
4.0out of 5
1 global rating