Description
Adding a red dot to a standard Glock usually means shipping your slide off to get milled, and that is a permanent, pricey commitment. The Cross Armory Dovetail to RMSc Mount Adapter skips all of that. It replaces your factory rear sight and gives you a low-profile RMSc mounting surface built right into a single machined block, so your slide stays exactly the way it left the factory. It's a smart route for anyone who wants to try a micro red dot without going all in on custom slide work.
What the Cross Armory RMSc Adapter Is Made Of
This one is cut from 17-4 stainless steel and finished in black nitride, which shrugs off corrosion and wear and holds up to a lifetime of holstering and range days. Because the mount, rear sight, and optic platform are all one solid unit, there are no stacked plates or extra parts to loosen up over time. That tight, integrated design is what keeps your dot locked to zero when the gun starts working.
Sights That Back Up Your Dot
The adapter comes with a bright green fiber-optic front sight pre-installed and a tall integrated rear, both cut to co-witness with most RMSc-footprint red dots. If your optic ever dies or the battery quits at the wrong moment, you still have functional iron sights sitting right there in the window. The fiber front grabs light fast, so target acquisition stays quick whether you're running the dot or the irons.
Installing the Cross Armory Dovetail Mount
No milling and no slide cutting. The kit includes the dovetail installation tools, a punch, and a hex wrench, so you or your armorer can pull the factory rear sight and seat the adapter in a few minutes. It fits OEM non-MOS Glock slides across a wide range of models including the 17, 19, 19X, 20, 21, 22, 23, 24, 26, 27, 29, 30, 30SF, 34, 36, 42, 43, 43X, 45, and 48. Just note it does not fit the Glock 44, the optic is not included, and you'll use the 6-32 mounting screws that come with your red dot.
Key Specifications
- Manufacturer: Cross Armory
- Manufacturer Part Number: CRDVADAPTER
- UPC: 740588596464
- Mount Type: Dovetail
- Optic Footprint: RMSc
- Material: 17-4 Stainless Steel
- Finish: Black Nitride
- Front Sight: Green Fiber-Optic, Pre-Installed
- Rear Sight: Integrated Tall Co-Witness Iron
- Optic Screw Thread: 6-32
- Platform Compatibility: OEM Non-MOS Glock Slides
- Optic Included: No
What’s Included
- Dovetail to RMSc mount adapter with pre-installed green fiber-optic front sight
- Dovetail installation tools
- Punch tool
- Hex wrench
Frequently Asked Questions
Do I need to cut or mill my Glock slide to use this dovetail RMSc adapter?
No. The adapter replaces your factory rear sight and drops right into the existing dovetail, so there is no milling or slide cutting involved. It comes with the punch, hex wrench, and dovetail tools you need to swap it in, and many owners have their armorer seat it in just a few minutes.
Which Glock models does the Cross Armory RMSc mount adapter fit?
It works with OEM non-MOS Glock slides across a wide lineup, including the 17, 19, 19X, 20, 21, 22, 23, 24, 26, 27, 29, 30, 30SF, 34, 36, 42, 43, 43X, 45, and 48. It does not fit the Glock 44. It is built for standard factory dovetail slides, not MOS-cut models.
Does it come with a red dot and mounting screws?
The optic is not included, so you'll pair it with your own RMSc-footprint red dot. You'll also use the 6-32 mounting screws that ship with your optic rather than screws from the kit. Just make sure the screws aren't longer than the plate so the adapter seats flush.
Can I still use iron sights if my red dot fails?
Yes, and that's one of the best parts of this setup. The adapter has a tall integrated rear sight and a bright green fiber-optic front, both cut to co-witness with most RMSc-footprint dots. If your optic goes dark you still have functional irons sitting right in the window.





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