The Shield Sights Low Profile Slide Mount for Glock 43 is a direct-to-slide mounting solution that lets you run a red dot on your compact carry gun without milling. If you've been hesitant about sending your slide to a gunsmith, this is the answer: the mount replaces your rear iron sight with a self-contained rear sight and mounting plate that sits flush with your optic. It's a reversible mod that keeps your Glock 43 combat-ready while adding the speed and certainty of a reflex sight to one of the most popular EDC platforms out there.

This mount is purpose-built for the RMSc optic, the compact red dot engineered for carry guns in this class. It will also accept standard RMS, SMS, SMS2, and Jpoint sights, though you may see slight width overhang at the edges depending on the optic footprint. The RMSw will mechanically fit, but because the mounting plate is narrower than the RMSw gasket, you may not get a perfect seal—something to keep in mind if that's your planned optic.

Installation is straightforward: remove your rear sight, drop in the Shield Sights mount, and bolt down your red dot. No gunsmithing required. If you ever need to revert to iron sights, you simply reverse the process. For shooters who want to modernize their carry Glock 43 without permanent modifications, this low-profile mount delivers a practical, reversible upgrade.

Key Features

• Direct slide mount for Glock 43—no milling or gunsmithing required
• Replaces rear iron sight for clean, integrated installation
• Flush fit with RMSc and SMSc optics
• Reversible modification—original sight can be reinstalled
• Compatible with RMS, SMS, SMS2, and Jpoint platforms

Specifications

Brand	Shield Sights
Firearm Compatibility	Glock 43
Primary Optic Fit	RMSc
Mount Type	Slide-mounted, rear sight replacement
Design	Low profile

Frequently Asked Questions

Will this mount work with my Glock 43 without gunsmithing?

Yes. The Shield Sights Low Profile Slide Mount replaces your rear iron sight and mounts directly to your slide—no milling or gunsmith work needed.

What red dots does this mount support?

It is purpose-built for the RMSc optic. It will also fit standard RMS, SMS, SMS2, and Jpoint sights, though these may show slight width overhang. The RMSw will mechanically fit but may not seal properly because the mounting plate is narrower than the RMSw gasket.

Can I remove this mount and go back to iron sights?

Yes. Since the mount replaces your rear sight rather than modifying the slide, you can reverse the installation and restore your original sighting system at any time.

Is this the same as milling my slide for an optic?

No. This is a non-permanent, sight-replacement solution. Slide milling is irreversible; this mount lets you upgrade to a red dot and revert to irons if needed.