Home / Optics / Vortex Defender-ST

What pistols fit the Vortex Defender-ST?

Page last updated . Data compiled September 2026 by Andrew Terrebonne.

It uses the Leupold DeltaPoint Pro footprint and mounts to 88 of the 178 slides tracked here, 17 of them with no adapter plate. An open-emitter optic: 1.48 oz, a CR2032 battery that loads from the top, with a 3 / 6 MOA reticle.

No plate neededPlate neededDoesn’t fit

Pistols that fit88 of 178
No plate to buy33
Plate to buy55
FootprintLeupold DeltaPoint Pro
EmitterOpen
Window25 × 19 mm
Dot options3 / 6 MOA
Weight1.48 oz
BatteryCR2032, top-load
Screws (footprint)M4 × 0.7
Torque (footprint)20 in-lb (confirm current Leupold spec)
Street price$300–450 · Vortex ↗

No plate to buy counts the direct mounts plus the pairings whose plate normally comes in the pistol's or the optic's box. Box contents change between production runs, so check yours before counting on it.

Weight from Vortex, Defender-ST ↗. Checked against them September 26, 2026.

Same slides, different optics

6 other optics on the Leupold DeltaPoint Pro footprint go on the same slides as the Vortex Defender-ST, so the table below answers for them too. What tells them apart:

OpticEmitterWindowWeightBatteryDot
Vortex Defender-STOpen25 × 19 mm1.48 ozCR2032, top-load3 / 6 MOA
Leupold DeltaPoint ProOpen25.7 × 17.5 mm2 ozCR2032, top-load2.5 / 6 MOA or 7.5 MOA delta
Vortex Defender-XLOpennot published here1.93 ozCR2032, top-load5 / 8 MOA
Vortex Defender-SLOpennot published herenot published hereCR20323 / 6 MOA
EOTECH EFLX MiniOpennot published here1.0 ozCR20323 / 6 MOA
Bushnell RXS-100Open25 mm objective (no width × height published)1.3 ozCR20324 MOA

All 7 Leupold DeltaPoint Pro optics

Sight co-witnessDepends on your front sight height, which can vary by SKU and production run within one model. Standard-height irons: no co-witness. Suppressor-height irons: normally a lower-third co-witness on a direct cut. Mounted directly, the optic sits as low as the cut allows, the best case for a co-witness. That's the typical case for this kind of optic, not a guarantee: pistols don't standardize sight and optic heights the way rifles do.
Leupold DeltaPoint Pro footprintCommon on competition slides and duty plate systems. Second only to RMR in plate availability.

Simplest slides to mount it on

No plate needed$300–450SIG Sauer P320 X-Carrydirect — no adapter16 other slides also take it with no plateBuild sheet
Plate already in the box$300–450Smith & Wesson M&P9 M2.0 Optics Ready (4.25 / 4.6 / 5 in)in-box plate: C.O.R.E. Plate 6 (DPP family)All 33 with no plate to buyBuild sheet
Cheapest plate to buy$313–475GLOCK 19 Gen5 MOSplate: MOS Plate 04Every slide it fits, cheapest firstBuild sheet

Cost to mount is the optic plus the cheapest plate that fits, in approximate street-price bands from September 2026, for comparing routes. Pistols aren't priced, so when slides tie, the card names the most popular one.

Every pistol, and how it mounts

ItemSlide cutHow it mountsCost to mount
Direct (cross-fit) — 17
Ruger RXMBuild sheetRuger RXM direct-mount optic cut (RMR, DPP, RMSc)direct — no adapter$300–450
Ruger RXM CompactBuild sheetRuger RXM direct-mount optic cut (RMR, DPP, RMSc)direct — no adapter$300–450
Shadow Systems DR920 / DR920PBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$300–450
Shadow Systems Foundation SeriesBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$300–450
Shadow Systems MR920Build sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$300–450
Shadow Systems MR920 Elite / CombatBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$300–450
Shadow Systems XR920 / XR920PBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$300–450
SIG Sauer P320 AXG Legion / AXG ProBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320 Spectre CompBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320 X-CarryBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320 XCompactBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320 XFive LegionBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320 XTenBuild sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
SIG Sauer P320-M17 / M18Build sheetSIG P320 optic cut (Romeo1Pro pattern)direct — no adapter$300–450
Springfield Armory EchelonBuild sheetSpringfield Echelon VISdirect — no adapter$300–450
Springfield Armory Echelon 4.0CBuild sheetSpringfield Echelon VISdirect — no adapter$300–450
Springfield Armory Echelon Compact 4.5CBuild sheetSpringfield Echelon VISdirect — no adapter$300–450
Plate in the box — 16
Canik SFx Rival / Rival-SBuild sheetCanik SFx Rival optic interface platesin-box plate: Canik interface R04 → RMSc / DeltaPoint Pro$300–450
Canik TP9 SFxBuild sheetCanik TP9 SFx optic interface platesin-box plate: Canik interface 04 → RMSc / DeltaPoint Pro$300–450
FN 509 CC EdgeBuild sheetFN MRD plate systemin-box plate: FN MRD → DeltaPoint Pro$300–450
FN 509 LS EdgeBuild sheetFN MRD plate systemin-box plate: FN MRD → DeltaPoint Pro$300–450
FN 509 Midsize MRD / Compact MRDBuild sheetFN MRD plate systemin-box plate: FN MRD → DeltaPoint Pro$300–450
FN 509 MRD / TacticalBuild sheetFN MRD plate systemin-box plate: FN MRD → DeltaPoint Pro$300–450
FN 510 / 545 MRDBuild sheetFN MRD plate systemin-box plate: FN MRD → DeltaPoint Pro$300–450
GLOCK 17 / 19 / 45 Gen6 (ORS)Build sheetGLOCK Gen6 ORSin-box plate: ORS Plate 04$300–450
Smith & Wesson M&P Carry CompBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P CompetitorBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P10mm M2.0 Optics ReadyBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P9 C.O.R.E. (pre-M2.0)Build sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P9 M2.0 Compact Optics ReadyBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P9 M2.0 MetalBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson M&P9 M2.0 Optics Ready (4.25 / 4.6 / 5 in)Build sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Smith & Wesson Performance Center M&P9 M2.0 Metal / Spec SeriesBuild sheetS&W M&P C.O.R.E. / Optics Readyin-box plate: C.O.R.E. Plate 6 (DPP family)$300–450
Plate to buy — 55
Beretta 92 GTSBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta 92FS X Performance ORBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta 92X / 92XI / 92XI SAOBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta 92X RDOBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta 92XI SqualoBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta 94X PerformanceBuild sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
Beretta APX A1 CompactBuild sheetBeretta APX A1 / APX RDO plate systemplate: Universal type F$325–510
Beretta APX A1 Full SizeBuild sheetBeretta APX A1 / APX RDO plate systemplate: Universal type F$325–510
Beretta APX RDOBuild sheetBeretta APX A1 / APX RDO plate systemplate: Universal type F$325–510
Beretta M9A4Build sheetBeretta 92X / M9A4 plate systemplate: 92X / M9A4 → Leupold DPP$325–510
CZ P-10 C Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → DeltaPoint Pro$360–545
CZ P-10 F Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → DeltaPoint Pro$360–545
CZ P-10 S Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → DeltaPoint Pro$360–545
CZ Shadow 2 Compact Optics ReadyBuild sheetCZ Shadow 2 OR plate systemplate: Shadow 2 OR → DeltaPoint Pro$360–545
CZ Shadow 2 Optics ReadyBuild sheetCZ Shadow 2 OR plate systemplate: Shadow 2 OR → DeltaPoint Pro$360–545
GLOCK 17 / 19 / 34 Gen4 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 17 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 19 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 19X MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 20 Gen5 MOS (10 mm)Build sheetGLOCK MOS — 10 mm / .45 framesplate: MOS Plate 08$313–475
GLOCK 21 Gen5 MOS (.45)Build sheetGLOCK MOS — 10 mm / .45 framesplate: MOS Plate 08$313–475
GLOCK 22 / 23 Gen5 MOS (.40)Build sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 26 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 34 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 35 Gen5 MOS (.40)Build sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 40 MOS (10 mm)Build sheetGLOCK MOS — 10 mm / .45 framesplate: MOS Plate 08$313–475
GLOCK 41 MOS (.45)Build sheetGLOCK MOS — 10 mm / .45 framesplate: MOS Plate 08$313–475
GLOCK 44 MOS (.22 LR)Build sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 45 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 47 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
GLOCK 49 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: MOS Plate 04$313–475
Heckler & Koch SFP9 OR (European VP9)Build sheetHK VP9 / SFP9 OR plate systemplate: VP9 OR → Holosun K / Shield RMSc / DeltaPoint Pro / Defender (EGW)$325–510
Heckler & Koch VP9 Match ORBuild sheetHK VP9 / SFP9 OR plate systemplate: VP9 OR → Holosun K / Shield RMSc / DeltaPoint Pro / Defender (EGW)$325–510
Heckler & Koch VP9 Optics ReadyBuild sheetHK VP9 / SFP9 OR plate systemplate: VP9 OR → Holosun K / Shield RMSc / DeltaPoint Pro / Defender (EGW)$325–510
Heckler & Koch VP9SK Optics ReadyBuild sheetHK VP9 / SFP9 OR plate systemplate: VP9 OR → Holosun K / Shield RMSc / DeltaPoint Pro / Defender (EGW)$325–510
Rost Martin RM1CBuild sheetRost Martin metal optic plate systemplate: Leupold DeltaPoint Pro metal optic plate$325–510
Rost Martin RM1SBuild sheetPlate system — fitment not publishedplate: Ask the maker → DeltaPoint Pro family$325–510
Ruger American Pistol CompetitionBuild sheetPlate system — fitment not publishedplate: Ask the maker → DeltaPoint Pro family$325–510
Springfield Armory 1911 DS Operator AOSBuild sheetSpringfield AOSplate: AOS → DeltaPoint Pro$325–510
Springfield Armory Prodigy (1911 DS)Build sheetSpringfield AOSplate: AOS → DeltaPoint Pro$325–510
Springfield Armory XD-M Elite OSPBuild sheetSpringfield AOSplate: AOS → DeltaPoint Pro$325–510
Taurus G3 TORO / G3X TOROBuild sheetTaurus T.O.R.O. plate systemplate: T.O.R.O. Plate #4$313–475
Taurus G3C TORO / G3X TOROBuild sheetTaurus T.O.R.O. plate systemplate: T.O.R.O. Plate #4$313–475
Walther PDP 2.0 CompactBuild sheetWalther PDP 2.0 optic cutplate: PDP 2.0 → Leupold DPP$325–510
Walther PDP 2.0 Full SizeBuild sheetWalther PDP 2.0 optic cutplate: PDP 2.0 → Leupold DPP$325–510
Walther PDP Compact (1.0)Build sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP Compact F-SeriesBuild sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP F-SeriesBuild sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP Full Size (1.0)Build sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP ProBuild sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP Pro SDBuild sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther PDP Steel FrameBuild sheetWalther PDP 1.0 optic cutplate: PDP 1.0 → DeltaPoint Pro$325–510
Walther Q4 SF Optics ReadyBuild sheetWalther Q4 SF / Q5 Match SF optic cutplate: Q-series → Leupold DPP$325–510
Walther Q5 Match SFBuild sheetWalther Q4 SF / Q5 Match SF optic cutplate: Q-series → Leupold DPP$325–510
Walther WMPBuild sheetPlate system — fitment not publishedplate: Ask the maker → DeltaPoint Pro family$325–510
No fit — 90
1911 / 2011 Non-optics-ready slideNo factory optic provisionno known route—
Any pistol No factory optic cut — custom mill requiredNo factory optic provisionno known route—
Archon Firearms Type B / Type D ORRMSc-pattern direct cutno known route—
Arex Delta Gen.2Arex Delta Gen.2 plate systemno known route—
Arex Zero 1 TacticalArex Zero 1 Tactical ROR plate systemno known route—
Avidity Arms PD10RMSc-pattern direct cutno known route—
Beretta 80X CheetahBeretta 80X Cheetah plate systemno known route—
Beretta 92FS / M9 (no optic cut)No factory optic provisionno known route—
Beretta APX A1 CarryRMSc-pattern direct cutno known route—
Bersa BP9CC ORRMSc-pattern direct cutno known route—
Canik METE MC9 / MC9LRMSc-pattern direct cutno known route—
Canik METE MC9 PrimeRMSc-pattern direct cutno known route—
Canik METE SFCanik METE optic cut (RMSc plus RMRcc or RMR)no known route—
Canik METE SFTCanik METE optic cut (RMSc plus RMRcc or RMR)no known route—
Canik METE SFT ProCanik METE optic cut (RMSc plus RMRcc or RMR)no known route—
Canik METE SFxCanik METE optic cut (RMSc plus RMRcc or RMR)no known route—
Canik TP9 Elite SCCanik TP9 Elite SC optic interfaceno known route—
Canik TTI CombatCanik TTI Combat optic interface platesno known route—
Canik TTI Combat MasterCanik TTI Combat optic interface platesno known route—
CZ 75 / SP-01 / Shadow 2 (non-OR)Rear-sight dovetail mountno known route—
CZ P-07 / P-09 (standard, no optic cut)Rear-sight dovetail mountno known route—
CZ P-07 NocturneCZ Nocturne direct cutno known route—
CZ P-09 Nocturne / P-09C NocturneCZ Nocturne direct cutno known route—
CZ Shadow 2 CarryCZ Shadow 2 Carry direct cut (Shield RMSc and Holosun K)no known route—
FN Reflex MRDRMSc-pattern direct cutno known route—
Girsan Witness2311RMSc-pattern direct cutno known route—
GLOCK 17 / 19 (non-MOS, no optic cut)No factory optic provisionno known route—
GLOCK 17 / 19 / 45 Gen6 A-CutAimpoint A-Cutno known route—
GLOCK 43X / 48 MOS-KGLOCK Slimline MOS-Kno known route—
GLOCK 43X / 48 Rail MOSGLOCK Slimline MOS (43X / 48)no known route—
GLOCK 43X MOSGLOCK Slimline MOS (43X / 48)no known route—
GLOCK 48 MOSGLOCK Slimline MOS (43X / 48)no known route—
IWI Masada SlimRMSc-pattern direct cutno known route—
Kimber KDS9cKimber KDS9c plate systemno known route—
Kimber R7 MakoKimber R7 Mako plate systemno known route—
Mossberg MC2sc Optic ReadyRMSc-pattern direct cutno known route—
Palmetto State Armory 5.7 Rock Optics ReadyRMSc-pattern direct cutno known route—
Palmetto State Armory Dagger Full Size / Compact (RMR cut)PSA Dagger RMR cutno known route—
Palmetto State Armory Dagger MicroRMSc-pattern direct cutno known route—
Rock Island Armory STK100RMSc-pattern direct cutno known route—
Ruger MAX-9RMSc-pattern direct cutno known route—
Ruger Ruger-5.7 Optics ReadyRMSc-pattern direct cutno known route—
SCCY CPX RDR / DVG-1 RDRRMSc-pattern direct cutno known route—
Shadow Systems CR920 / CR920PShadow Systems CR920 optic cut (RMSc pattern)no known route—
SIG Sauer P226 / P229 (non-RX, no optic cut)No factory optic provisionno known route—
SIG Sauer P226 / P229 Legion RXSIG Romeo1 cut (P226 / P229 RX Legion)no known route—
SIG Sauer P320 Full-Size / Carry (SIG-LOC PRO slide)SIG-LOC PRO slide — P320no known route—
SIG Sauer P320-M17 / M18 (SIG-LOC slide)SIG-LOC slide — M17 / M18no known route—
SIG Sauer P322 / P322 CompSIG P322 optic cut (RMSc pattern)no known route—
SIG Sauer P365 FuseSIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365 Optics ReadySIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365-380SIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365-AXG LegionSIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365-XMACRO / XMACRO CompSIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365XSIG P365 optic cut (RMSc pattern)no known route—
SIG Sauer P365X / P365-XL / P365-AXG Legion (SIG-LOC slide)SIG-LOC slide — P365no known route—
SIG Sauer P365XLSIG P365 optic cut (RMSc pattern)no known route—
Smith & Wesson CSX E-Series Optics ReadyRMSc-pattern direct cutno known route—
Smith & Wesson M&P 22 MagnumRMSc-pattern direct cutno known route—
Smith & Wesson M&P 5.7S&W M&P 5.7 direct cutno known route—
Smith & Wesson M&P EqualizerS&W Equalizer optic cutno known route—
Smith & Wesson M&P Shield M2.0 Optics ReadyS&W M&P Shield M2.0 optics-ready cutno known route—
Smith & Wesson M&P Shield Plus Carry CompRMSc-pattern direct cutno known route—
Smith & Wesson M&P Shield Plus Optics ReadyS&W M&P Shield Plus optics-ready cutno known route—
Smith & Wesson M&P9 M2.0 (non-OR, no optic cut)No factory optic provisionno known route—
Smith & Wesson M&P9 M2.0 Metal with Aimpoint ACRO CutS&W M&P ACRO direct cutno known route—
Springfield Armory 1911 DS Prodigy 4.25in COAAimpoint A-Cutno known route—
Springfield Armory 1911 Operator .45 COAAimpoint A-Cutno known route—
Springfield Armory 1911 TRP .45 COAAimpoint A-Cutno known route—
Springfield Armory Echelon 4.0C COAAimpoint A-Cutno known route—
Springfield Armory Echelon 4.0FC COAAimpoint A-Cutno known route—
Springfield Armory Echelon 4.5F COAAimpoint A-Cutno known route—
Springfield Armory Hellcat OSPSpringfield Hellcat OSP cut (Micro footprint)no known route—
Springfield Armory Hellcat ProSpringfield Hellcat OSP cut (Micro footprint)no known route—
Springfield Armory Hellcat Pro Comp OSPSpringfield Hellcat OSP cut (Micro footprint)no known route—
Springfield Armory Hellcat RDPSpringfield Hellcat OSP cut (Micro footprint)no known route—
Springfield Armory XD-S Mod.2 OSPRMSc-pattern direct cutno known route—
Staccato C2Staccato / 2011 optic plate systemno known route—
Staccato CSRMSc-pattern direct cutno known route—
Staccato PStaccato / 2011 optic plate systemno known route—
Staccato XCStaccato / 2011 optic plate systemno known route—
Staccato XLStaccato / 2011 optic plate systemno known route—
Stoeger STR-9MCRMSc-pattern direct cutno known route—
Taurus Defender 856 TOROTaurus 856 T.O.R.O. revolver cutno known route—
Taurus GX4 Carry TOROTaurus GX4 T.O.R.O. direct cutno known route—
Taurus GX4 Graphene TOROTaurus GX4 T.O.R.O. direct cutno known route—
Taurus GX4 TORO / GX4XLTaurus GX4 T.O.R.O. direct cutno known route—
Taurus Judge TORO / Raging HunterTaurus Judge T.O.R.O. revolver cutno known route—
Taurus TX22 CompactRMSc-pattern direct cutno known route—
Tisas Carry DS / Duty DSRMSc-pattern direct cutno known route—

Already own it?

Taking it from one pistol to another? What changes on each kind of slide: the plate, the screw thread at each joint, torque and thread traps.

Build one

Open the fit checker with this optic selected, or click any "how it mounts" cell above for that pairing's verdict and build sheet.

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