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THE SIG STORE HERITAGE HERITAGE OPTICS COLLECTION THE DO-IT-ALL DEFENDER VORTEX DEFENDER-ST 3 MOA RED DOT • MODEL DFST-MRD3 MOUNTING FOOTPRINT LEUPOLD DELTAPOINT PRO / DPP Includes Glock MOS Adapter • Includes Picatinny Mount • Common Mounting Screws Included EXCELLENT FOR COMPATIBLE OPTICS-READY SIG P320 • SIG P211-GTO • SIG P226 • STANDARD-WIDTH GLOCK MOS Direct mounting or adapter-plate mounting depends on the exact slide cut and generation. See the fitment table immediately below. AWARD-WINNING DEFENDER SERIES 2024 RED DOT OF THE YEAR Award presented to the Vortex Defender Series, including the Defender-ST. WILL IT FIT MY OPTICS-READY PLATFORM? Start with the mounting cut, not only the model name. The Defender-ST uses the full-size DPP footprint. QUICK RULE: A DPP / SIG PRO / R2 top-mount cut is usually a direct fit. A plate-system slide requires the correct DPP adapter plate. PLATFORM FIT STATUS MOUNTING INFORMATION SIG P320 Optics-Ready YES - DIRECT Direct mount on P320 slides with the SIG PRO / R2 / DPP top-mount cut. Not for the original ROMEO1-only cut. SIG P211-GTO YES - TOP MOUNT The SIG-LOC PRO slide accepts traditional top-mount reflex sights. The Defender-ST mounts as a DPP-style top-mount optic and does not use the SIG-LOC bottom-mount feature. Confirm screw length and recoil-lug pin configuration. SIG P226 Optics-Ready YES - DIRECT Direct mount on P226 PRO-CUT / R2 / DPP slides. Not for original ROMEO1-only or non-optics-ready slides. Commercial SIG M17 / M18 YES - DPP CUT Fits commercial top-mount slides using the DPP / PRO pattern. Not for military-issue or commemorative single-screw SIG-LOC M17 / M18 slides. Glock Gen4 / Gen5 Standard-Width MOS YES - INCLUDED PLATE Use the included Vortex Glock MOS adapter. Common examples include optics-ready G17, G19, G34, G45 and G47 variants. Not for slimline G43X / G48 MOS. Glock Gen6 Standard-Frame Optic-Ready YES - PLATE 04 Use Glock OEM Optic Plate 04 and the hardware specified by Glock. The Gen6 plate system is separate from the Vortex Gen4 / Gen5 MOS adapter. Picatinny Rail YES - INCLUDED MOUNT The factory package includes a low-profile Picatinny mount for compatible rail-equipped platforms. OTHER COMMON OPTICS-READY MODELS These commonly use a model-specific DPP adapter plate. The required plate is not included unless it is the Vortex Glock MOS adapter described above. WALTHER PDP / PDP F-SERIES
Use the correct Walther-pattern DPP plate for the exact slide generation. S&W M&P M2.0 OPTICS-READY
Use the appropriate DPP plate and hardware for the exact factory optic system. FN 509 MRD / CZ P-10 OR
Use the manufacturer-specific DPP plate for the exact model and generation. OTHER PLATE-SYSTEM SLIDES
Select a plate specifically identified for the DPP / DeltaPoint Pro footprint. IMPORTANT: NOT A DIRECT FIT FOR THESE COMMON CUTS SIG P365 / P365X / P365XL / XMACROThese typically use the smaller COMPACT / Shield RMSc-style footprint, not the full-size DPP footprint. Glock 43X MOS / Glock 48 MOSSlimline MOS uses a compact micro-optic mounting system. The included standard-width Glock MOS plate does not fit these models. Original SIG ROMEO1-Only CutOriginal ROMEO1-only slides are different from the later PRO / R2 / DPP cut. RMR-Only Direct-Milled SlideRMR and DPP are different footprints. A compatible conversion plate is required when one is available. Non-Optics-Ready SlideRequires a compatible mounting solution or professional slide machining. PRECISION 3 MOA RED DOT The 3 MOA aiming point provides refined target coverage and a clean visual reference with minimal target obstruction. 3 MOA BRIGHT RED • REFINED • PRECISE Model DFST-MRD3 • UPC 843829133296 WHY CHOOSE THE DEFENDER-ST A generous viewing window, rugged 7075 aluminum housing, practical controls, and a comprehensive factory accessory package. ASPHERICAL LENS
Designed for a clear, natural-looking sight picture with low distortion and true-to-life color. 7075 ALUMINUM HOUSING
Built for durability under regular handling, transport, training, and competition use. SHOCKSHIELD INSERT
An internal polymer insert helps absorb impact and protect internal components. TEXTURED FRONT FACE
Aggressive front texturing provides added purchase during handling. TOP-LOADING CR2032
Replace the battery without removing the optic from its mounting surface. MOTION ACTIVATION
Motion-sensitive operation helps keep the optic ready while conserving battery power during inactivity. 12 BRIGHTNESS SETTINGS
Ten daylight settings and two night-vision-compatible settings. UP TO 25,000 HOURS
Published continuous runtime at the specified setting and operating conditions. FACTORY MOUNTING ACCESSORIES The original factory package includes a standard-width Glock MOS adapter, Picatinny mount, and common mounting screw sets. GLOCK MOS ADAPTERIncluded for compatible standard-width Gen4 / Gen5 Glock MOS systems. PICATINNY MOUNTIncluded for compatible rail-equipped platforms. Included adapters and screw sets are not universal. Always verify the correct plate, screw thread, screw length, and torque specification for the exact mounting system. FACTORY PACKAGE INCLUDES OpticVortex Defender-ST 3 MOA Micro Red Dot BatteryCR2032 Battery Mounting AccessoriesGlock MOS Adapter, Picatinny Mount, and Common Screw Sets ProtectionRubber Cover and Lens Cloth InstallationVortex Custom Tool and Mounting Hardware TECHNICAL SPECIFICATIONS ModelDFST-MRD3 UPC843829133296 Reticle3 MOA Bright Red Dot Magnification1x FootprintLeupold DeltaPoint Pro / DPP BatteryTop-Loading CR2032 Published RuntimeUp to 25,000 Hours at the Specified Setting Brightness12 Settings: 10 Daylight / 2 Night Vision Adjustment1 MOA Per Click Length1.83 Inches Width1.20 Inches Height1.20 Inches Weight1.48 Ounces HERITAGE SELECTED Selected for its full-size viewing window, precise 3 MOA dot, DPP footprint, rugged construction, top-loading battery, and useful factory mounting package. HERITAGE BUYING CONFIDENCE GENUINE FACTORY PRODUCT
New Vortex optic supplied in its original factory package. DETAILED FITMENT GUIDE
Clear footprint and mounting information before purchase. FAST, PROTECTIVE SHIPPING
Carefully packed to protect the optic and factory contents. RESPONSIVE CUSTOMER SERVICE
Direct communication and prompt order support. VORTEX VIP WARRANTY Supported by Vortex\'s Unlimited, Unconditional, Lifetime VIP Warranty. Warranty eligibility and service remain subject to Vortex\'s current published terms. HERITAGE OPTICS COLLECTION Carefully selected optics and accessories with clear fitment information. BUILD YOUR HERITAGE PERFORMANCE • COMPATIBILITY • VALUE Compatibility information is a general fitment guide and is not exhaustive. Manufacturers may revise optic cuts, plate systems, recoil bosses, and screw specifications between models or production generations. Confirm the exact mounting system, adapter plate, screw thread, screw length, and manufacturer instructions before purchase or installation. Adapter plates or specialized hardware may be required and are not included unless specifically stated. Vortex, Defender-ST, SIG SAUER, P320, P211-GTO, P226, Glock, Leupold, DeltaPoint Pro, and associated product names are trademarks of their respective owners. The SIG Store Heritage is not affiliated with or endorsed by these manufacturers. Brand and product names are used only for identification. Proper installation, torque verification, screw selection, thread-locking procedures, and zero confirmation are the buyer\'s responsibility.
