RMSc Footprint Compatible Handguns

Over the last decade, the use of dot sight optics on handguns has grown in popularity. From military and law enforcement to competition, home defense and concealed carry to recreational shooting, optics can be found on more guns now than ever before.

To meet demands of modern shooters, more pistols and revolvers enter the market each year capable of accepting red (and green) dot optics – often referred to as “optics ready” – or shipped with optics already installed. However, not every optic fits every optic-ready handgun.

While dot sights are typically mounted to the handgun’s slide (or frame, in the case of revolvers), how they are mounted depends on the optic’s dimensional footprint and mounting standard. Determined by a specific screw and socket pattern, the mounting standard dictates which optics can fit the handgun directly or with the use of mounting plates, pins, or adapters.

The most common handgun red dot optic mounting standards include:

• Trijicon RMR Mounting Standard
• Noblex (formerly Docter) Mounting Standard
• C-More Mounting Standard
• Shield RMSc Mounting Standard

Of course, proprietary optic footprints also exist, as well as handgun manufacturer optic systems – like the Glock Modular Optic System (MOS) and Springfield Amory’s Variable Interface System (VIS) – further complicating what can be an already confusing task for gun owners.

To simplify optic mounting, this blog will focus on the RMSc Mounting Standard, used by the original Swampfox Sentinel and new Sentinel II micro dot sight.

Established by Shield Sights, the RMSc (also referred to as RMS/SMS) has become the go-to optic mounting standard for slimline, single-stack or modified double stack compact, subcompact, and micro compact handguns popularized for concealed carry.

Similar to the Noblex/Docter pattern, the RMSc Mounting Standard features two screw holes and four sockets in each corner to accept recoil lugs/pins, though wider and closer together than Noblex optics. The RMSc screw-socket pattern also accommodates two size optics – micro dot sights and those using the larger Leupold DeltaPoint Pro footprint. Dimensionally, micro RMSc footprint optics measure 40mm in length while those of the Leupold measure up to 46mm in length. Optic widths also vary, with the Leupold and similar footprint optics designed for true double stack, full-size, and compact handguns.

It should be noted that while RMSc optics will fit Leupold footprints and mounting plates, the shorter and/or slimmer footprint may lack slide contact and reveal more of the wider optic plate. In these cases, optics of comparable size should be used.

Pistols and revolvers listed below specifically utilize the RMSc Mounting Standard for micro dot sights. While extensive, this list is not comprehensive and is updated periodically.

** Noted handguns require the use of factory mounting plates, adapter, or pins.

Archon Firearms

Type B OR/OSR

Type D OR/OSR

Arex Defense

Delta Gen.2 **

Zero 1 Tactical Compact **

Zero 1 Tactical **

Avidity Arms

PD10

Beretta

APX A1 Carry **

80X Cheetah **

Bersa

BP9CC OR

Canik

Mete MC9

Mete SF

Mete SFT

Mete SFT Pro

Mete SFx

TP9 Elite SC **

TP9SFx **

TTI Combat **

SFx Rival **

CZ-USA

P-10 S OR **

P-10 C OR **

P-10 F OR **

Shadow 2 Compact OR **

Shadow 2 OR **

Dan Wesson

Specialist Black Optics Ready **

Daniel Defense

H9 **

FN America

Reflex MRD

Glock

43X MOS

48 MOS

Girsan

Witness2311

IWI US

Masada Slim

Kimber

R7 Mako OR / TFS / Carbon Compact

CDS9

KDS9c

Langdon Tactical

Beretta Tomcat RDO

Mossberg

MC2sc Optic Ready

Palmetto State Armory

5.7 Rock Optics Ready

Dagger Micro

Rock Island Armory

STK100

Rost Martin

RM1C **

Ruger

MAX-9

5.7 OR

SAR USA

SAR9 Subcompact Gen2

SAR9 Compact Gen3

SAR9 Gen3

SAR9 Sport Gen3

SAR9 SOCOM

SCCY

CPX-1 / 2 / 3 / 4 RDR

DVG-1 RDR

Shadow Systems

CR920 Combat / Elite

CR920P

SIG Sauer

P322 / Comp

P365-380

P365 Optic Ready

P365X

P365XL

P365-XMACRO / Comp

P365-AXG Legion

Smith & Wesson

M&P 22 Magnum

Performance Center M&P Shield M2.0 OR

M&P Shield Plus OR

Equalizer

Springfield Armory

Hellcat OSP

Hellcat RDP

Hellcat Pro

XD-S Mod.2 OSP

Echelon **

1911 DS Prodigy **

Staccato

Staccato CS **

Staccato C2 **

Staccato C **

Staccato P **

Staccato XC **

Staccato XL **

Stoeger

STR-9MC

Taurus

TX 22 Compact

GX4 TORO

GX4XL

GX4 Carry TORO

Defender 856 TORO

327 TORO

605 TORO

Judge TORO

Magnum Judge TORO

Tisas USA

Carry Double Stack

Duty Double Stack

Night Stalker Double Stack SF

Walther

WMP **

PDP Compact**

PDP Full Size **

PDP Pro SD Compact **

PDP Pro SD Full Size **

Q4 SF OR **

Q5 Match SF **