In 2026, choosing a Glock 43 Slimline type complete slide assembly requires balancing optics footprint geometry (RMSc vs. RMRcc) with internal safety tolerances.
Note: Glock 42 and 43 slides DO NOT require firing pin channel liners because they are slimline carry Glocks.
Unlike full-sized Glocks (G17/19), the 43X striker channel is machined to a tighter tolerance where the striker sleeve acts as its own guide. Never force a standard channel liner into a 43X aftermarket slide; you will cause light primer strikes.
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| Slide Assembly | Optics Footprint | Best Frame Match | Distinct Technical Advantage |
| PSA Micro Dagger (NEW) | Shield RMSc | Glock 43X / Micro Dagger | Best Value; Optic sits lower than MOS |
| Shadow Systems CR920P | Multi-Footprint | CR920 / 43X | Built-in compensator; No threaded barrel needed |
| TRYBE Defense V2 | RMSc | P80 / 43X | Most aggressive weight-reduction windows |
| Brownells RMRcc | Trijicon RMRcc | Glock 43 / 43X | Only dedicated RMRcc-milled slide (No plates) |
| Norsso Singularity | Multiple | Custom / High-End | Deepest serrations for wet-hand manipulation |
PSA MICRO DAGGER - Best Value
The Value PSA Micro Dagger Complete Slide
- For under $250, this slide provides a direct Shield RMSc cut.
- Unlike the Glock 43X MOS slide which requires a plate for many optics (making them sit high), the Micro Dagger slide is milled deeper. This allows for a True Co-witness with standard height iron sights when using a Holosun 407K/507K.
Warning: When using 15-round magazines (Shield S15 or PSA Micro), the increased upward pressure from the magazine spring can slow down lighter aftermarket slides. If you experience 'Failure to Feed,' we recommend switching back to the OEM Glock Recoil Spring Assembly (RSA), as many aftermarket 'complete' slides use generic springs that are too light for high-capacity mags.
Shadow Systems CR920P - Built In Compensator
- Shadow Systems now sells their complete upper assemblies. The "P" version includes a proprietary compensator that uses a wedge system rather than threads.
- If you live in a state with "Assault Weapon" bans that prohibit threaded barrels, the CR920P is your only legal way to have a compensated 43X, as the compensator is technically a non-threaded attachment.
TRYBE Defense Glock Slide - Best Overall
TRYBE Defense makes popular Glock slide products at good prices. Their Glock 43 compensated slide and barrel set has a nice grip and looks great.
Cover Plate Included - All optic ready slides come with cover plates. Works for Polymer 80 builds as well
Faster Follow Up - Lighter slide to reduce recoil momentum to reacquire the sight faster
Show Off Barrel - Side windows shows off the slick custom barrel you have
Lightening Cuts - Improved for fast cycling and aggressive serration
Better Optics Compatibility - RMSc
*Get a TRYBE Defense threaded match grade barrel here
Pros
- Optic ready right out of the box
- Serrated slide with Cerakote
- Compensated slide
- Corrision resistent
- Window cuts to show off barrel design
Cons
- RMSc Only
- Window cuts may not be field reliable
Brownell Glock 43 Slide RMRcc - Trijicon RMRcc Ready
The Brownell Glock 43X MOS slide for RMRcc is ready right out of the box. It features index posts in the mounting holes for improved screw thread contact and a secure optic mount.
The 43X market is split. If you want the Trijicon RMRcc, you must buy the Brownells slide. If you want Holosun (K-series) or Shield, every other slide on this list is your target. Do not buy an RMSc slide expecting to 'make an RMRcc fit'—the screw spacing is physically different
Optics Compatibility - RMRcc ONLY
Grey Ghost Precision - Best Serration Patterns
Grey Ghost Precision offers ZEV alike Glock 43X optics ready slide kit with aggressive serration cuts. The new Holosun 407K, 507K and EPS Carry will all fit on this slide. 6-32 smaller mounting screw is needed for mounting these optics.
V1 & V2 - Angled serrations or diamond checkering pattern for different variation
Gen 5 Compatible - The V2 version is compatible with Gen 5 Glock 43 and Glock 43X
Compatible With OEM Parts - It works with existing Glock 43 internal parts & Polymer 80 lowers
Optics Compatibility - RMSc footprint only
Pros
- Unique slide front cut
- Works with SS80 Glock 43 build
- Tighter tolerance
- Comes with cover plate
Cons
- Comes with no iron sights
- RMR doesn't fit, but it's okay
Norsso Singularity Slide - Best Serration Cuts
Norsso makes a top-quality Glock 43X stainless steel slide. Out of many options, we recommend this one the most.
Side window serrations can kind of help index the support hand slightly to manage recoil.
The N43 Singularity slide is ready for optics and works with ones like the Shield RMSc, Holosun 507K, Romeo Zero, and Swampfox Sentinel.
A special feature of this Glock 43X slide is the sharp rear edges that help you grip it without it slipping. Besides their regular items, Norsso can also make custom slides based on what you want o their website.
FAQ
Does A Glock 43X Slide Work With Polymer 80 PF9SS Frame?
Yes. These recommended slides work for Polymer 80 PF9SS frame.
Are Optic Cuts Worth It?
The factory Glock 43 slide works just fine to mount optics with compatible optic plates. We recommend CHPWS plates.
If you want to mount an optic without having to mill it or buy a Glock 43 MOS, an optic ready Glock slide is here for you.
In addition, these slides offer better aesthetics, serration patterns and overall feel.
How Long Is A Glock 43 Slide?
A Glock 43 slide measures 6.06 inches. Most aftermarket Glock slides will work with your existing holsters (Except for using a compensator)
How To Mount A RMRcc On A Glock 43?
To mount a RMRcc on a Glock 43 slide, it's best to mill the holes on a blank factory Glock 43 Slide (Non- MOS). This is way better option than buying adapter plates that end up mounting the optic too tall.
Most optic ready Glock 43 slides are milled for RMSc. Get the Brownell slide we recommended above for RMRcc
