
C&H Precision EDC-XL
RMR-footprint enclosed-emitter carry and duty optic with a larger sight window

The Staccato HD P4 mounts red dots through the HOST optic system rather than one factory footprint. A HOST adapter matching your optic's pattern sits in the slide, and Staccato describes the arrangement as matching the footprint of the optic to the top of the slide while the optic itself still attaches directly into the slide. Factory HOST adapters cover the Trijicon RMR, RMR HD, and SRO family, the Leupold DeltaPoint Pro, and the Aimpoint ACRO. C&H Precision adds HOST plates for RMR, ACRO, and the Shield RMSc and Holosun K micro pattern, and the Calculated Kinetics HD DOGTAG plates reach the Holosun 509T and EPS footprints as well.
HOST is an HD-only system. Staccato lists the HOST mounting kit for the HD C3.6, HD C4X, HD P4, and HD P4.5, and not for the CS, C, C2, P, XC, or XL, while the Dawson Precision optic kits that fit those models are listed as not compatible with any HD. Nothing crosses in either direction, so the first thing to read on a used plate listing is which half of the lineup it names. Inside the HD family the P4 and the longer P4.5 take the same adapters.
Trijicon RMR / Holosun 507C optics mount on the Staccato HD P4 through a plate in that footprint. Bolt the plate into the slide first, then the optic to the plate.

RMR-footprint enclosed-emitter carry and duty optic with a larger sight window

Slim RMR-footprint dot with a large 8 MOA reticle and Cyelee's STIG-RS lens treatment

RMR carry optic with 3 MOA dot and 45 MOA circle-dot choices in a shorter housing.

Open-emitter RMR-footprint red dot with a wide window, side-loading CR1632, and a switchable 3 MOA + 32 MOA MRS reticle.

RMR-footprint open-emitter competition optic with a wide window and multi-reticle options

Large-window RMR-footprint competition optic with 2 MOA dot and 38 MOA circle options

Fully enclosed RMR-footprint pistol dot with a gas-filled housing and side-loading CR1620

Large-window RMR competition optic with a 6 MOA red or green dot and 1 MOA adjustments.

Large-window RMR optic with 3 MOA dot and 45 MOA circle-dot reticle options.

Multi-reticle micro red dot with solar failsafe and shake awake

Third-gen multi-reticle pistol dot with photodiode sensor, Solar Failsafe, and RMR footprint

Titanium-housed open-emitter micro red dot on the RMR footprint with a larger window than the 507C.

Original Osight reflex sight on the RMR footprint with a single 3 MOA dot, magnetic charging cover, and aluminum housing.

Open-emitter RMR-footprint red dot with a wide window, OAL housing, and a magnetic charging cover for rechargeable operation.

Enclosed-emitter duty red dot on the RMR footprint with the AMRS five-reticle system and a field-swappable side-loading CR1632 battery.

Duty-rated enclosed-emitter red dot on the RMR footprint with a 2/6+32 MOA multi-reticle system and a magnetic charging cover.

An RMR-footprint open dot with three selectable reticles, a 50,000 hour CR1632, IPX67 sealing, and a Picatinny adapter in the box at $329.99.

Budget closed-emitter pistol red dot that ships with both RMR and Glock MOS plates

Titanium RMR-footprint pistol dot with a large aspheric window and selectable reticles
Trijicon's enclosed-emitter pistol red dot on the RMR footprint with top-load battery
The original pistol red dot that defined the category
Green-LED 2.5 MOA version of the SRO announced May 2026: same wide circular window, RMR footprint, and top-loading CR2032, in black or coyote brown.
Shield RMSc / Holosun K optics mount on the Staccato HD P4 through a plate in that footprint. Bolt the plate into the slide first, then the optic to the plate.

Compact open-emitter carry optic on the RMSc footprint with red, green, and MRS variants

The value Holosun K-series. Single 6 MOA dot, Shake Awake, side-loading CR1632, and the K Series / modified RMSc footprint. ~$100 cheaper than the 507K X2.

Green-dot version of the open-emitter RMSc Osight K, with a 6 MOA green dot, side-loading CR1620, and motion sensor activation.

Entry-level open-emitter RMSc red dot with a 6 MOA dot, side-loading CR1620, and motion sensor activation.

Enclosed-emitter red dot on the RMSc footprint with a switchable 2 MOA dot and 32 MOA circle, side-loading battery, and IPX7 sealing.

Enclosed-emitter green dot on the RMSc footprint with a side-loading battery and a 75,000-hour runtime, at a value price.

Enclosed-emitter 6 MOA red dot on the RMSc footprint with a side-loading battery, motion sensor, and IPX7 sealing for slim carry guns.

Enclosed-emitter RMSc-footprint carry optic with a low-profile compact housing

Large-window RMSc-footprint multi-reticle optic for compact pistols and shotgun plates

One-ounce enclosed-emitter dot on the slim RMSc cut for carry slides

RMSc open-emitter carry dot with a protected 20mm window and side-loading CR1632.

Large-window 6 MOA dot for RMSc and Holosun K mounting patterns.

Enclosed 3 MOA RMSc optic with a side-loading battery and 6.25mm deck.

Compact multi-reticle optic for slim and subcompact pistols

Enclosed emitter compact optic for slim pistols

Full-size enclosed pistol optic on Holosun K-series footprint with included RMR adapter plate

Enclosed-emitter RMSc red dot with a magnetic charging cover, OAL housing, and a 2 MOA + 32 MOA multi-reticle system.

Sub-half-ounce micro red dot on the Shield RMSc footprint for P365 and similar carry pistols

Mid-tier RMSc-footprint micro red dot with Shake N' Wake auto-on, recessed hood for lens protection, and a clean 3 MOA dot, $269 (red) or $299 with tritium.

Large-window competition pistol dot with selectable 2 and 6 MOA reticles

Closed emitter micro pistol optic with solar assist on the Shield RMSc footprint

Camo RMSc-footprint hunting red dot for handguns, shotguns, and scout-style mounts

Solar-charging enclosed micro red dot with multi-reticle system for slim carry pistols

The original RMSc that defined the slim-pistol footprint standard. UK-made glass-edition reflex sight with a 4 MOA dot, $379, the platonic Shield-cut optic.

SIG's enclosed-emitter pistol red dot on the RMSc footprint, with MOTAC motion activation and a side-loading CR1632.
Leupold DeltaPoint Pro optics mount on the Staccato HD P4 through a plate in that footprint. Bolt the plate into the slide first, then the optic to the plate.

American-made competition optic with excellent glass clarity

Enclosed-emitter red dot built on the DeltaPoint Pro footprint, with a 0.91 x 0.71 inch window, switchable 2 MOA dot and 32 MOA circle, and a side-loading CR1620 tray.

Full-size SIG optic for P320 X-series and similar platforms

Closed-emitter DPP-footprint pistol red dot with solar assist and a multi-reticle.

All-purpose DPP-footprint pistol red dot with top-load CR2032 and Glock MOS plate.

Large-window pistol red dot on the DeltaPoint Pro footprint with top-load battery

Solar-powered enclosed pistol optic with direct SIG P320 fit and DPP footprint compatibility
Aimpoint ACRO optics mount on the Staccato HD P4 through a plate in that footprint. Bolt the plate into the slide first, then the optic to the plate.

USA-made closed-emitter duty pistol optic on the ACRO footprint at a sub-$350 price

Closed-emitter ACRO XL-footprint duty optic with the larger double-bar clamp interface

A $249.99 enclosed-emitter dot on the ACRO footprint, 1.32 oz, with a side battery door so the zero survives a battery change.

ACRO-compatible enclosed pistol dot with three reticle patterns and a side battery

Premium enclosed emitter with 50,000 hour battery life

Steiner closed-emitter pistol optic with 3.3 MOA dot on the ACRO footprint

Second-generation enclosed ACRO-footprint pistol dot running up to 90,000 hours on a CR2032
Holosun 509T optics mount on the Staccato HD P4 through a plate in that footprint. Bolt the plate into the slide first, then the optic to the plate.

Enclosed emitter micro red dot for maximum durability

Gold-reticle version of the titanium enclosed-emitter 509T for eyes that lose red dots on bright or busy backgrounds

Full-size enclosed emitter pistol dot with AEMS optics in 509T footprint
The Staccato HD P4 mounts red dots through the HOST optic system rather than one factory footprint. A HOST adapter matching your optic's pattern sits in the slide, and Staccato describes the arrangement as matching the footprint of the optic to the top of the slide while the optic itself still attaches directly into the slide. Factory HOST adapters cover the Trijicon RMR, RMR HD, and SRO family, the Leupold DeltaPoint Pro, and the Aimpoint ACRO. C&H Precision adds HOST plates for RMR, ACRO, and the Shield RMSc and Holosun K micro pattern, and the Calculated Kinetics HD DOGTAG plates reach the Holosun 509T and EPS footprints as well.
Yes, for almost every optic. The Staccato HD P4 mounts red dots through a plate system, so you bolt the plate matching your optic's footprint into the slide and then bolt the optic to the plate. Plates are available for the Trijicon RMR / Holosun 507C, Shield RMSc / Holosun K, Leupold DeltaPoint Pro, Aimpoint ACRO and Holosun 509T footprints.
Yes, on a plate. The Holosun 507C X2 is a Trijicon RMR / Holosun 507C footprint optic, so it mounts on the Staccato HD P4 using a matching plate such as the Staccato HD HOST RMR Adapter and C&H Precision Staccato HD HOST RMR Plate. Install the plate to the slide first, then the optic to the plate.
Yes, on a plate. The Trijicon RMR Type 2 is a Trijicon RMR / Holosun 507C footprint optic, so it mounts on the Staccato HD P4 using a matching plate such as the Staccato HD HOST RMR Adapter and C&H Precision Staccato HD HOST RMR Plate. Install the plate to the slide first, then the optic to the plate.
Yes, on a plate. The Holosun 507K X2 is a Shield RMSc / Holosun K footprint optic, so it mounts on the Staccato HD P4 using a matching plate such as the C&H Precision Staccato HD HOST RMSc / Holosun K Plate and Calculated Kinetics Staccato HD DOGTAG Optic Plate. Install the plate to the slide first, then the optic to the plate.
Yes, on a plate. The Holosun EPS Carry mounts on the Staccato HD P4 using a matching plate such as the C&H Precision Staccato HD HOST RMSc / Holosun K Plate and Calculated Kinetics Staccato HD DOGTAG Optic Plate. Install the plate to the slide first, then the optic to the plate.
No. The Dawson Precision optic kits that fit the CS, C, C2, P, XC, and XL are listed as not compatible with the HD C3.6, HD C4X, HD P4, or HD P4.5. The HD slide takes HOST adapters, and those are sold as a separate family for the HD models only.
To the slide. Staccato describes the HOST adapters as matching the footprint of your optic to the top of the slide, with the optic attached directly to the slide rather than into the adapter body. That is why the system uses longer optic screws than a conventional stacked plate.
Yes. The HOST mounting kit is listed for the HD C3.6, HD C4X, HD P4, and HD P4.5 together, so the adapter that fits a P4 fits the longer P4.5. Barrel length and slide length change, the HOST interface does not.