
C&H Direct Mount Optic for HK Optics Ready Pistols
C&H direct-mount pistol optic for HK optics-ready pistols including VP9-family and CC9-style hosts.

The HK CC9 mounts red dots on a footprint HK spells out as RMSc / 407K, milled directly into the slide with no adapter plate in the stack. That single cut answers both micro patterns, so the Shield RMSc and the Holosun K family both bolt to the steel: the 407K and 507K, the enclosed EPS Carry and SCS Carry, the SIG Romeo Zero Elite and ROMEO-X Compact, the Vortex Defender-CCW, the Swampfox Sentinel II and the Gideon Judge II. The footprints that do not fit are the larger ones, the Trijicon RMR and the Holosun 507C, because the pocket is sized for micro optics rather than for a compact-slide dot.
HK splits the CC9 into two lines and the difference decides what you still need to buy. Optics Ready guns leave the factory with the cut and a tritium front sight against a blacked-out serrated rear, and no dot. Optics Equipped guns arrive with the optic already fitted, either a Holosun 407K or a Vortex Defender-CCW, and with blacked-out front and rear serrated sights instead. The slide cut is the same on both, so an Optics Ready pistol takes any of the micro dots on this page, while an Optics Equipped pistol is a package with the glass priced in.
These optics carry the Shield RMSc footprint the slide is cut for. Screws, recoil bosses, and pocket all line up, so they seat on the slide with no plate.

C&H direct-mount pistol optic for HK optics-ready pistols including VP9-family and CC9-style hosts.

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

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.

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

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.
The HK CC9 mounts red dots on a footprint HK spells out as RMSc / 407K, milled directly into the slide with no adapter plate in the stack. That single cut answers both micro patterns, so the Shield RMSc and the Holosun K family both bolt to the steel: the 407K and 507K, the enclosed EPS Carry and SCS Carry, the SIG Romeo Zero Elite and ROMEO-X Compact, the Vortex Defender-CCW, the Swampfox Sentinel II and the Gideon Judge II. The footprints that do not fit are the larger ones, the Trijicon RMR and the Holosun 507C, because the pocket is sized for micro optics rather than for a compact-slide dot.
No. The HK CC9 slide is cut for the Shield RMSc footprint and Shield RMSc optics bolt straight to the slide.
Yes. The SIG Romeo Zero Elite uses the Shield RMSc footprint that the HK CC9 slide is cut for, so it bolts straight to the slide with no adapter plate.
No. HK specifies the CC9 cut as RMSc / 407K, a combined pattern rather than an RMSc-only pocket, and HK ships Optics Equipped CC9 pistols with a 407K mounted from the factory. That is the case where the usual two-lug versus four-lug argument does not apply, because the slide was milled for both patterns from the start.
No. The CC9 pocket is the micro RMSc / 407K pattern. The RMR and 507C footprints are physically larger with different screw spacing, and there is no plate that grows a micro cut into a full-size one. Stay inside the RMSc and Holosun K family and the fit is direct.
No, and the CC9 does not need one. The VP9 optics-ready slide uses a numbered plate that drops into a plate pocket; the CC9 is milled for the optic itself, with no plate pocket for a VP9 plate to sit in. The two systems have nothing in common beyond the maker.