Vortex Defender-ST Micro 6 MOA Red Dot Sight, Black - DFST-MRD6
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Vortex Optics
Overview
The Vortex Defender-ST Micro 6 MOA Red Dot Sight is a compact optic designed for quick target acquisition and versatility in various shooting scenarios. With a 6 MOA dot size, it provides a clear aiming point that is easy to track, while the Picatinny mounting interface ensures compatibility with a wide range of firearms. This red dot sight is commonly found on builds featuring a carbine gas system chambered in 5.56 NATO, making it a reliable choice for tactical and competitive applications.
Specifications
Vortex Defender-ST Micro 6 MOA Red Dot Sight, Black - DFST-MRD6
Available Merchants(6)
Prices checked
Price Alert
November 2026 so far on GunPartPicker
Vortex Defender-ST Micro 6 MOA Red Dot Sight, Black - DFST-MRD6 is the ninth most added optic on GunPartPicker so far in November 2026, behind the Vortex Optics StrikeFire II Red / Green Dot Sight - 4 MOA, with about 2% of all optics added to builds. That's its 2nd straight month at #9. Builds with this optic are mostly chambered in 5.56 NATO (77%, then 300 Blackout 12%), split between mid-length (54%) and carbine-length (23%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 6 retailers we track have it in stock. It dipped to $263.99 at Sportsman Warehouse for a stretch in October 2026, well under its usual $299.99, so sales do come around. Buying today, the lowest price is $299.99 at Brownells, above October's low of $263.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by hundreds of builds that include this one
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Rise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
Bravo Company Manufacturing 5.56 NATO Mid-Length Bhf AR-15 Barreled Upper - MCMR-15 - 16"
SilencerCo Velos LBP 556 Rifle Suppressor, Black
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
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.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Vortex Defender-ST Micro 6 MOA Red Dot Sight, Black - DFST-MRD6
| Build | Parts | Total |
|---|---|---|
 | 22 | $1845.89 |
 | 25 | $5781.85 |
 | 25 | $1349.44 |
 | 22 | $1486.95 |
 | 30 | $2943.65 |
 | 10 | $754.54 |
 | 10 | $1152.61 |
 | 22 | $5042.80 |
 | 10 | $1378.82 |
 | 26 | $2664.98 |
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