Home / Optics / Olight Osight K

What pistols fit the Olight Osight K?

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

It uses the Holosun K footprint and mounts to 99 of the 178 slides tracked here, 51 of them with no adapter plate. An open-emitter optic.

No plate neededPlate neededDoesn’t fit

Pistols that fit99 of 178
No plate to buy51
Plate to buy48
FootprintHolosun K
EmitterOpen
Screws (footprint)M3, M4 or #6-32, by optic
Torque (footprint)15 in-lb
Street price$60–150 · Olight ↗

Same slides, different optics

6 other optics on the Holosun K footprint go on the same slides as the Olight Osight K, so the table below answers for them too. What tells them apart:

OpticEmitterWindowWeightBatteryDot
Olight Osight KOpennot published herenot published herenot published herenot published here
Holosun 507K X2Open19.6 × 14.7 mm1.0 ozCR1632, side-load2 MOA + 32 MOA circle
Holosun 407K X2Open19.6 × 14.7 mm1.0 ozCR1632, side-load6 MOA
Holosun 507K X3 / 407K X3Open19.5 × 14.7 mmnot published hereCR16322 MOA + 32 MOA circle / 6 MOA
Holosun EPS CarryEnclosed19.6 × 14.7 mm1.23 ozCR16202 / 6 MOA
Holosun EPSEnclosed22.9 × 16.0 mm1.4 ozCR16202 / 6 MOA + 32 MOA circle

All 7 Holosun K 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.
Holosun K footprintRMSc screw spacing with the two rear recoil lugs left off. So a K optic fits an RMSc cut only where that cut has no rear lugs; on a four-lug cut such as the original GLOCK Slimline MOS it needs a plate. Whether an RMSc-pattern optic goes on a K cut the other way round is up to each slide's maker; each pistol's page says what that maker lists. Holosun packs different screw pairs with different K models, so check what came in the box.

Simplest slides to mount it on

No plate needed$60–150SIG Sauer P365XLdirect — no adapter50 other slides also take it with no plateBuild sheet
Cheapest plate to buy$85–210GLOCK 19 Gen5 MOSplate: V4 MIL/LEO (one SKU per footprint)Every 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 — 3
CZ P-07 NocturneBuild sheetCZ Nocturne direct cutdirect — no adapter$60–150
CZ P-09 Nocturne / P-09C NocturneBuild sheetCZ Nocturne direct cutdirect — no adapter$60–150
GLOCK 43X / 48 MOS-KBuild sheetGLOCK Slimline MOS-Kdirect — no adapter$60–150
Direct (cross-fit) — 48
Archon Firearms Type B / Type D ORBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Avidity Arms PD10Build sheetRMSc-pattern direct cutdirect — no adapter$60–150
Beretta APX A1 CarryBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Bersa BP9CC ORBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Canik METE MC9 / MC9LBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Canik METE MC9 PrimeBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
CZ Shadow 2 CarryBuild sheetCZ Shadow 2 Carry direct cut (Shield RMSc and Holosun K)direct — no adapter$60–150
FN Reflex MRDBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Girsan Witness2311Build sheetRMSc-pattern direct cutdirect — no adapter$60–150
IWI Masada SlimBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Mossberg MC2sc Optic ReadyBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Palmetto State Armory 5.7 Rock Optics ReadyBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Palmetto State Armory Dagger MicroBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Rock Island Armory STK100Build sheetRMSc-pattern direct cutdirect — no adapter$60–150
Ruger MAX-9Build sheetRMSc-pattern direct cutdirect — no adapter$60–150
Ruger Ruger-5.7 Optics ReadyBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
SCCY CPX RDR / DVG-1 RDRBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Shadow Systems CR920 / CR920PBuild sheetShadow Systems CR920 optic cut (RMSc pattern)direct — no adapter$60–150
Shadow Systems DR920 / DR920PBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$60–150
Shadow Systems Foundation SeriesBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$60–150
Shadow Systems MR920Build sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$60–150
Shadow Systems MR920 Elite / CombatBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$60–150
Shadow Systems XR920 / XR920PBuild sheetShadow Systems multi-optic cut (MR920, DR920, XR920)direct — no adapter$60–150
SIG Sauer P322 / P322 CompBuild sheetSIG P322 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365 FuseBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365 Optics ReadyBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365-380Build sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365-AXG LegionBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365-XMACRO / XMACRO CompBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365XBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
SIG Sauer P365XLBuild sheetSIG P365 optic cut (RMSc pattern)direct — no adapter$60–150
Smith & Wesson CSX E-Series Optics ReadyBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Smith & Wesson M&P 22 MagnumBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Smith & Wesson M&P 5.7Build sheetS&W M&P 5.7 direct cutdirect — no adapter$60–150
Smith & Wesson M&P Shield Plus Carry CompBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Springfield Armory EchelonBuild sheetSpringfield Echelon VISdirect — no adapter$60–150
Springfield Armory Echelon 4.0CBuild sheetSpringfield Echelon VISdirect — no adapter$60–150
Springfield Armory Echelon Compact 4.5CBuild sheetSpringfield Echelon VISdirect — no adapter$60–150
Springfield Armory XD-S Mod.2 OSPBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Staccato CSBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Stoeger STR-9MCBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Taurus Defender 856 TOROBuild sheetTaurus 856 T.O.R.O. revolver cutdirect — no adapter$60–150
Taurus GX4 Carry TOROBuild sheetTaurus GX4 T.O.R.O. direct cutdirect — no adapter$60–150
Taurus GX4 Graphene TOROBuild sheetTaurus GX4 T.O.R.O. direct cutdirect — no adapter$60–150
Taurus GX4 TORO / GX4XLBuild sheetTaurus GX4 T.O.R.O. direct cutdirect — no adapter$60–150
Taurus Judge TORO / Raging HunterBuild sheetTaurus Judge T.O.R.O. revolver cutdirect — no adapter$60–150
Taurus TX22 CompactBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Tisas Carry DS / Duty DSBuild sheetRMSc-pattern direct cutdirect — no adapter$60–150
Plate to buy — 48
Arex Delta Gen.2Build sheetArex Delta Gen.2 plate systemplate: Delta Gen.2 optic plate — type 5$85–210
Beretta 80X CheetahBuild sheetBeretta 80X Cheetah plate systemplate: 80X Cheetah → Holosun K$85–210
CZ 75 / SP-01 / Shadow 2 (non-OR)Build sheetRear-sight dovetail mountplate: Dovetail mount → Holosun K$95–235
CZ P-07 / P-09 (standard, no optic cut)Build sheetRear-sight dovetail mountplate: Dovetail mount → Holosun K$95–235
CZ P-10 C Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → RMSc / Holosun K$120–245
CZ P-10 F Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → RMSc / Holosun K$120–245
CZ P-10 S Optics ReadyBuild sheetCZ P-10 OR plate systemplate: P-10 OR → RMSc / Holosun K$120–245
CZ Shadow 2 Compact Optics ReadyBuild sheetCZ Shadow 2 OR plate systemplate: Shadow 2 OR → RMSc / Holosun K$120–245
CZ Shadow 2 Optics ReadyBuild sheetCZ Shadow 2 OR plate systemplate: Shadow 2 OR → RMSc / Holosun K$120–245
FN 509 CC EdgeBuild sheetFN MRD plate systemplate: FN MRD → Holosun K / EPS$85–210
FN 509 LS EdgeBuild sheetFN MRD plate systemplate: FN MRD → Holosun K / EPS$85–210
FN 509 Midsize MRD / Compact MRDBuild sheetFN MRD plate systemplate: FN MRD → Holosun K / EPS$85–210
FN 509 MRD / TacticalBuild sheetFN MRD plate systemplate: FN MRD → Holosun K / EPS$85–210
FN 510 / 545 MRDBuild sheetFN MRD plate systemplate: FN MRD → Holosun K / EPS$85–210
GLOCK 17 / 19 / 34 Gen4 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 17 / 19 / 45 Gen6 (ORS)Build sheetGLOCK Gen6 ORSplate: Gen 6 MIL/LEO → Holosun 407K / 507K / SIG ROMEOZero / Olight Osight K, S$120–245
GLOCK 17 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 19 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 19X MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 20 Gen5 MOS (10 mm)Build sheetGLOCK MOS — 10 mm / .45 framesplate: V4 MIL/LEO (large frame)$85–210
GLOCK 21 Gen5 MOS (.45)Build sheetGLOCK MOS — 10 mm / .45 framesplate: V4 MIL/LEO (large frame)$85–210
GLOCK 22 / 23 Gen5 MOS (.40)Build sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 26 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 34 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 35 Gen5 MOS (.40)Build sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 40 MOS (10 mm)Build sheetGLOCK MOS — 10 mm / .45 framesplate: V4 MIL/LEO (large frame)$85–210
GLOCK 41 MOS (.45)Build sheetGLOCK MOS — 10 mm / .45 framesplate: V4 MIL/LEO (large frame)$85–210
GLOCK 44 MOS (.22 LR)Build sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 45 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 47 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
GLOCK 49 Gen5 MOSBuild sheetGLOCK MOS — standard & full sizeplate: V4 MIL/LEO (one SKU per footprint)$85–210
Kimber KDS9cBuild sheetKimber KDS9c plate systemplate: KDS9c → RMSc / Holosun K (incl. rear sight)$85–210
Kimber R7 MakoBuild sheetKimber R7 Mako plate systemplate: R7 Mako → Holosun 407K / 507K / Osight S$85–210
Smith & Wesson M&P Carry CompBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P CompetitorBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P10mm M2.0 Optics ReadyBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P9 C.O.R.E. (pre-M2.0)Build sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P9 M2.0 Compact Optics ReadyBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P9 M2.0 MetalBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson M&P9 M2.0 Optics Ready (4.25 / 4.6 / 5 in)Build sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Smith & Wesson Performance Center M&P9 M2.0 Metal / Spec SeriesBuild sheetS&W M&P C.O.R.E. / Optics Readyplate: M&P 2.0 → Holosun K$85–210
Springfield Armory 1911 DS Operator AOSBuild sheetSpringfield AOSplate: AOS → Holosun K / EPS$85–210
Springfield Armory Prodigy (1911 DS)Build sheetSpringfield AOSplate: AOS → Holosun K / EPS$85–210
Springfield Armory XD-M Elite OSPBuild sheetSpringfield AOSplate: AOS → Holosun K / EPS$85–210
Taurus G3 TORO / G3X TOROBuild sheetTaurus T.O.R.O. plate systemplate: T.O.R.O. → Holosun 407K / 507K$85–210
Taurus G3C TORO / G3X TOROBuild sheetTaurus T.O.R.O. plate systemplate: T.O.R.O. → Holosun 407K / 507K$85–210
Walther PDP 2.0 CompactBuild sheetWalther PDP 2.0 optic cutplate: PDP 2.0 → Holosun K / EPS$85–210
Walther PDP 2.0 Full SizeBuild sheetWalther PDP 2.0 optic cutplate: PDP 2.0 → Holosun K / EPS$85–210
No fit — 79
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—
Arex Zero 1 TacticalArex Zero 1 Tactical ROR plate systemno known route—
Beretta 92 GTSBeretta 92X / M9A4 plate systemno known route—
Beretta 92FS / M9 (no optic cut)No factory optic provisionno known route—
Beretta 92FS X Performance ORBeretta 92X / M9A4 plate systemno known route—
Beretta 92X / 92XI / 92XI SAOBeretta 92X / M9A4 plate systemno known route—
Beretta 92X RDOBeretta 92X / M9A4 plate systemno known route—
Beretta 92XI SqualoBeretta 92X / M9A4 plate systemno known route—
Beretta 94X PerformanceBeretta 92X / M9A4 plate systemno known route—
Beretta APX A1 CompactBeretta APX A1 / APX RDO plate systemno known route—
Beretta APX A1 Full SizeBeretta APX A1 / APX RDO plate systemno known route—
Beretta APX RDOBeretta APX A1 / APX RDO plate systemno known route—
Beretta M9A4Beretta 92X / M9A4 plate systemno 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 SFx Rival / Rival-SCanik SFx Rival optic interface platesno known route—
Canik TP9 Elite SCCanik TP9 Elite SC optic interfaceno known route—
Canik TP9 SFxCanik TP9 SFx optic interface platesno known route—
Canik TTI CombatCanik TTI Combat optic interface platesno known route—
Canik TTI Combat MasterCanik TTI Combat optic interface platesno 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 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—
Heckler & Koch SFP9 OR (European VP9)HK VP9 / SFP9 OR plate systemno known route—
Heckler & Koch VP9 Match ORHK VP9 / SFP9 OR plate systemno known route—
Heckler & Koch VP9 Optics ReadyHK VP9 / SFP9 OR plate systemno known route—
Heckler & Koch VP9SK Optics ReadyHK VP9 / SFP9 OR plate systemno known route—
Palmetto State Armory Dagger Full Size / Compact (RMR cut)PSA Dagger RMR cutno known route—
Rost Martin RM1CRost Martin metal optic plate systemno known route—
Rost Martin RM1SPlate system — fitment not publishedno known route—
Ruger American Pistol CompetitionPlate system — fitment not publishedno known route—
Ruger RXMRuger RXM direct-mount optic cut (RMR, DPP, RMSc)no known route—
Ruger RXM CompactRuger RXM direct-mount optic cut (RMR, DPP, RMSc)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 AXG Legion / AXG ProSIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320 Full-Size / Carry (SIG-LOC PRO slide)SIG-LOC PRO slide — P320no known route—
SIG Sauer P320 Spectre CompSIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320 X-CarrySIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320 XCompactSIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320 XFive LegionSIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320 XTenSIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320-M17 / M18SIG P320 optic cut (Romeo1Pro pattern)no known route—
SIG Sauer P320-M17 / M18 (SIG-LOC slide)SIG-LOC slide — M17 / M18no known route—
SIG Sauer P365X / P365-XL / P365-AXG Legion (SIG-LOC slide)SIG-LOC slide — P365no 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 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—
Staccato C2Staccato / 2011 optic plate systemno 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—
Walther PDP Compact (1.0)Walther PDP 1.0 optic cutno known route—
Walther PDP Compact F-SeriesWalther PDP 1.0 optic cutno known route—
Walther PDP F-SeriesWalther PDP 1.0 optic cutno known route—
Walther PDP Full Size (1.0)Walther PDP 1.0 optic cutno known route—
Walther PDP ProWalther PDP 1.0 optic cutno known route—
Walther PDP Pro SDWalther PDP 1.0 optic cutno known route—
Walther PDP Steel FrameWalther PDP 1.0 optic cutno known route—
Walther Q4 SF Optics ReadyWalther Q4 SF / Q5 Match SF optic cutno known route—
Walther Q5 Match SFWalther Q4 SF / Q5 Match SF optic cutno known route—
Walther WMPPlate system — fitment not publishedno 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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