Red dot optics that fit the Sig Sauer P320 M18

The Sig Sauer P320 M18 accepts the SIG P320 X-series plate system and mounts 85 optics via an adapter plate. Every fit below is source-cited.

Accepts:  SIG P320 X-series plate system 85 optics fit 0 direct · 85 via plate

Fits with an adapter plate

RMR footprint · 33 optics · via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR)

Bushnell RXM-300 RMR Via plate $299.95 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun 407C-X2 (2 variants) RMR Via plate $185.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun 507C-X2 (2 variants) RMR Via plate $232.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun HE407C-X3 (2 variants) RMR Via plate $249.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun HE407COMP-GR-6 RMR Via plate $289.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun HE507C-X3-GR RMR Via plate $329.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun HE507COMP-GR RMR Via plate $399.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

Holosun HE508T-X2 (2 variants) RMR Via plate $369.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMR) plate (SIG P320 X-series plate system to RMR).

See all 33 RMR optics

RMSc footprint · 30 optics · via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc)

Burris FastFire C RMSc Via plate $175.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Bushnell RXC-200 RMSc Via plate $229.95 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Bushnell RXU-200 RMSc Via plate $179.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Meprolight MPO PRO-S RMSc Via plate $238.49 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Meprolight MPO-DS RMSc Via plate $164.47 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Meprolight MPO-S RMSc Via plate $225.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Primary Arms Classic Series 21mm Micro Reflex Sight Gen 2 RMSc Via plate $149.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

Shield Sights AMS – Advanced Mini Sight RMSc Via plate $382.49 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (RMSc) plate (SIG P320 X-series plate system to RMSc).

See all 30 RMSc optics

DPP footprint · 15 optics · via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP)

Bushnell RXE-MR1 DPP Via plate $329.95 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

Bushnell RXS-10 DPP Via plate $149.95 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

Bushnell RXS-100 DPP Via plate $107.49 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

EOTech EFLX (2 variants) DPP Via plate $270.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

EOTech EFLX CE DPP Via plate $358.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

Leupold DeltaPoint Pro DPP Via plate $449.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

Sig Sauer Romeo-RS Pro DPP Via plate $153.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

Sig Sauer Romeo-X Enclosed Pro DPP Via plate $459.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (DPP) plate (SIG P320 X-series plate system to DPP).

See all 15 DPP optics

Docter footprint · 6 optics · via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter)

Burris FastFire 3 Docter Via plate $239.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

Burris FastFire 4 Docter Via plate $279.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

Primary Arms SLx RS-10 Docter Via plate $209.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

Vortex Viper Docter Via plate $199.99 OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

Crimson Trace CTS-1250 Compact Open Reflex Sight Docter Via plate Shop at OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

Vortex Venom Docter Via plate Shop at OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (Docter) plate (SIG P320 X-series plate system to Docter).

See all 6 Docter optics

C-More STS footprint · 1 optic · via the OEM/Aftermarket SIG P320 X-series plate system optic plate (C-More STS)

Primary Arms GLx RS-15 C-More STS Via plate Shop at OpticsPlanetShop on Amazon Why?

Adapter fit: via the OEM/Aftermarket SIG P320 X-series plate system optic plate (C-More STS) plate (SIG P320 X-series plate system to C-More STS).

See all 1 C-More STS optic

All 16 pistols with the SIG P320 X-series plate system

Frequently asked

What optics fit the Sig Sauer P320 M18?

85 additional optics fit via an adapter plate, such as the Burris FastFire 3 and Burris FastFire 4. 85 total.

What footprint does the P320 M18 use?

The P320 M18 has no optic footprint milled into the slide. It takes the SIG P320 X-series plate system, and the plate you fit decides which footprint the optic sees.

Do I need an adapter plate to mount a red dot on the P320 M18?

The P320 M18 takes a slide plate. Its plates present the RMR, RMSc, DPP, Docter and C-More STS footprints.

How do we know these optics fit?

Compatibility is derived from the optic footprint data and, where applicable, verified adapter-plate specifications. Each claim is backed by 1 source URL, and we never list a fit without a traceable reference.