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The Holosun K footprint
Page last updated . Data compiled September 2026 by Andrew Terrebonne.
Modified RMSc; 407K / 507K / EPS / SCS Carry
- Layout
- 2 screws, 2 forward lugs (rear posts omitted)
- Screws
- M3, M4 or #6-32, by optic
- Driver
- T10
- Torque
- 15 in-lb
- Pattern
- shares RMSc screw centers
These are the usual figures for this footprint; no maker document is linked for them here yet. What would settle it.
What to knowRMSc 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.
What uses the Holosun K footprint?
7 optics use it, 51 pistols are cut for it and 49 plates provide it. Screws M3, M4 or #6-32, by optic; torque 15 in-lb. The lists below name each optic, pistol and plate.
Optics using this footprint
- Holosun 507K X2
- Holosun 407K X2
- Holosun 507K X3 / 407K X3
- Holosun EPS Carry
- Holosun EPS
- Holosun SCS Carry
- Olight Osight K
Pistols that mount it with no adapter
- GLOCK 43X / 48 MOS-K
- Smith & Wesson M&P 5.7
- Smith & Wesson M&P 22 Magnum
- Smith & Wesson CSX E-Series Optics Ready
- SIG Sauer P365 Optics Ready
- SIG Sauer P365X
- SIG Sauer P365XL
- SIG Sauer P365-XMACRO / XMACRO Comp
- SIG Sauer P365-AXG Legion
- SIG Sauer P365-380
- SIG Sauer P365 Fuse
- SIG Sauer P322 / P322 Comp
- Springfield Armory Echelon
- Springfield Armory Echelon 4.0C
- Springfield Armory XD-S Mod.2 OSP
- CZ P-09 Nocturne / P-09C Nocturne
- CZ P-07 Nocturne
- CZ Shadow 2 Carry
- Canik METE MC9 / MC9L
- Shadow Systems MR920
- Shadow Systems DR920 / DR920P
- Shadow Systems XR920 / XR920P
- Shadow Systems CR920 / CR920P
- Shadow Systems Foundation Series
- FN Reflex MRD
- Beretta APX A1 Carry
- Ruger MAX-9
- Ruger Ruger-5.7 Optics Ready
- Taurus GX4 TORO / GX4XL
- Taurus GX4 Carry TORO
- Taurus TX22 Compact
- Taurus Defender 856 TORO
- Taurus Judge TORO / Raging Hunter
- Staccato CS
- Palmetto State Armory Dagger Micro
- Palmetto State Armory 5.7 Rock Optics Ready
- Mossberg MC2sc Optic Ready
- IWI Masada Slim
- Archon Firearms Type B / Type D OR
- Girsan Witness2311
- Tisas Carry DS / Duty DS
- Stoeger STR-9MC
- SCCY CPX RDR / DVG-1 RDR
- Avidity Arms PD10
- Rock Island Armory STK100
- Bersa BP9CC OR
- Springfield Armory Echelon Compact 4.5C
- Smith & Wesson M&P Shield Plus Carry Comp
- Canik METE MC9 Prime
- Shadow Systems MR920 Elite / Combat
- Taurus GX4 Graphene TORO
Plates that provide this footprint
| Slide interface | Plate | Source |
|---|---|---|
| GLOCK MOS — standard & full size | V4 MIL/LEO (one SKU per footprint) | C&H Precision |
| GLOCK MOS — 10 mm / .45 frames | V4 MIL/LEO (large frame) | C&H Precision |
| GLOCK Gen6 ORS | Gen 6 MIL/LEO → Holosun EPS / EPS Carry / SCS Carry Gen 6 MIL/LEO → Holosun 407K / 507K / SIG ROMEOZero / Olight Osight K, S | C&H Precision ↗ C&H Precision ↗ |
| GLOCK Slimline MOS (43X / 48) | V4 MIL/LEO 43X / 48 MOS → Holosun 407K / 507K V4 MIL/LEO 43X / 48 MOS → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| Springfield Hellcat OSP cut (Micro footprint) | Hellcat (RMSc footprint) → Holosun 407K / 507K Hellcat (RMSc footprint) → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| S&W M&P Shield Plus optics-ready cut | M&P Shield Plus → Holosun 407K / 507K M&P Shield Plus → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| S&W M&P Shield M2.0 optics-ready cut | M&P 2.0 Shield → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ |
| S&W Equalizer optic cut | Equalizer / M&P 5.7 → Holosun 407K / 507K | C&H Precision ↗ |
| Canik METE optic cut (RMSc plus RMRcc or RMR) | METE → Holosun K DOGTAG | Calculated Kinetics ↗ |
| S&W M&P C.O.R.E. / Optics Ready | C.O.R.E. Plate 2 (Shield / RMSc family) M&P 2.0 → Holosun K M&P 2.0 → EPS / EPS Carry / SCS Carry Steel plates — MPS / RMR / K | S&W factory ↗ C&H Precision ↗ C&H Precision ↗ Athena Precision ↗ |
| SIG P320 optic cut (Romeo1Pro pattern) | P320 → Holosun 407K / 507K / Vortex Defender-CCW / Olight Osight S P320 → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| Springfield AOS | AOS → Holosun K / EPS | C&H Precision ↗ |
| Walther PDP 1.0 optic cut | PDP 1.0 → Holosun 407K / 507K / Osight S PDP 1.0 → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| Walther PDP 2.0 optic cut | PDP 2.0 → Holosun K / EPS | C&H Precision ↗ |
| CZ P-10 OR plate system | P-10 OR → RMSc / Holosun K | CZ factory ↗ |
| CZ Shadow 2 OR plate system | Shadow 2 OR → RMSc / Holosun K | CZ factory ↗ |
| Rear-sight dovetail mount | Dovetail mount → Holosun K | EGW ↗ |
| Canik TP9 SFx optic interface plates | TP9 DOGTAG → Holosun K | Calculated Kinetics ↗ |
| Canik SFx Rival optic interface plates | TP9 DOGTAG → Holosun K | Calculated Kinetics ↗ |
| Canik TTI Combat optic interface plates | TTI → Holosun K DOGTAG | Calculated Kinetics ↗ |
| Canik TP9 Elite SC optic interface | Elite SC → Holosun K | Calculated Kinetics ↗ |
| Shadow Systems multi-optic cut (MR920, DR920, XR920) | MR920 / XR920 → Holosun K / EPS MR920 / XR920 → Holosun EPS / EPS Carry | C&H Precision ↗ C&H Precision ↗ |
| Shadow Systems CR920 optic cut (RMSc pattern) | CR920 → Holosun 407K / 507K / Vortex Defender-CCW / Osight S CR920 → Holosun EPS / EPS Carry / SCS Carry | C&H Precision ↗ C&H Precision ↗ |
| FN MRD plate system | FN MRD → Holosun K / EPS | C&H Precision ↗ |
| Beretta 80X Cheetah plate system | 80X Cheetah → Holosun K | Beretta factory ↗ |
| HK VP9 / SFP9 OR plate system | HK Holosun K plate (51000381) VP9 / SFP9 → Holosun K / Osight S VP9 / SFP9 → Holosun EPS / EPS Carry / SCS Carry VP9 OR → Holosun K / Shield RMSc / DeltaPoint Pro / Defender (EGW) | HK factory ↗ C&H Precision ↗ C&H Precision ↗ EGW ↗ |
| Staccato / 2011 optic plate system | Staccato → Holosun 507K Staccato → Holosun EPS / EPS Carry / SCS Carry | Dawson Precision ↗ Dawson Precision ↗ |
| Taurus T.O.R.O. plate system | T.O.R.O. → Holosun 407K / 507K T.O.R.O. → Holosun EPS / EPS Carry | C&H Precision ↗ C&H Precision |
| Arex Delta Gen.2 plate system | Delta Gen.2 optic plate — type 5 | Aftermarket |
| Ruger RXM direct-mount optic cut (RMR, DPP, RMSc) | RXM → Holosun 407K / 507K | C&H Precision ↗ |
| Kimber KDS9c plate system | KDS9c → RMSc / Holosun K (incl. rear sight) | Kimber factory ↗ |
| Kimber R7 Mako plate system | R7 Mako → Holosun 407K / 507K / Osight S R7 Mako → 407K / 507K / EPS Carry | C&H Precision ↗ C&H Precision ↗ |
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