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RMSC CUT SLIDE FOR GLOCK® 43 Reviews & Ratings

The Brownells RMSC Cut Slide for Glock® 43 enables you to install a Red Dot with the RMSC footprint on your pocket Glock®. It offers all the benefits of our "Front Cut" slide for Glock® 43, including forward slide serrations that give you extra leverage in manipulating G43's slide against its stiff recoil spring. The cutout on top of the slide behind the ejection port accepts a Shield Sights RMS or other red dot that fits the RMSC mounting footprint. The RMS Cut Slide for Glock® 43 also comes with a factory rear sight dovetail and slot for the front sight tenon. They will accept both factory plastic sights and any aftermarket sights that fit the factory cuts, enabling you to co-witness "iron" sights with the red dot for backup.

NOTE: Requires 6-40 Size screws which Brownells does not currently carry.

Compatible Red Dots:
-Shield RMSC
-Vortex CCW Defender
-Holosun 507K & 508K
-Holosun EPS
-Sig Romeo Zero Elite
-Swampfox Sentinel
-Springfield Armory WASP
-Riton MPRD

Features:

Machined from heat-treated & hardened 17-4 stainless steel billet
Hard, wear-resistant matte black Nitride finish
Internal dimensions identical to factory slide
Includes Factory rear sight dovetail & front sight tenon cut
Slide only - no internal parts (see Gun Tech Note below)

Our RMS Cut Slide gives you more grasping surface on your Glock® 43 by adding deep-cut serrations up front. This is a big help when making a quick press check of the chamber. Both the front and rear serrations are cut to the same depth as the factory grooves - so there's no compromise of overall slide strength. Crisp 90-degree edges on the grooves give you excellent purchase for chambering a round on the first try.

Brownells Gun Tech™ Note: The Shield Sights RMSC Cut Slide for Glock® 43 consists of the bare slide only. You will need to retain your pistol's existing barrel (or an aftermarket upgrade) and recoil guide / spring assembly, extractor, extractor depressor & spring assembly, and rear coverplate. The G43 slide does not require a firing pin channel liner.

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Reviews Summary

The RMSC Cut Slide for Glock 43 receives mixed reviews from users. While some appreciate its fitment and appearance, others report serious issues with internal tolerances, rust in the screw areas, and unreliable performance. Customer service is noted for responsiveness. Prospective buyers should be cautious as some products may have significant quality control problems.

What Reviewers Are Saying

Product Quality

55%

Reviewers express concern about the overall quality of the slide, particularly noting issues with internal tolerances that lead to jamming and failures to feed in various Glock frames. Many users emphasize a lack of consistency in the manufacturing process, leading to mixed performance experiences.

Fitment and Installation

45%

Many users report that the slide fits well on their Glock frames and is easy to install. Comments highlight successful use of factory internals and indicate the slide's aesthetic appeal, but some also mention issues with fit, such as loose screws and alignment problems.

Quality Control Issues

60%

A recurring theme is dissatisfaction with quality control, particularly indicated by rust in mounting holes and inconsistencies in screw sizing. Many reviewers suggest that the product may have been shipped without proper inspection, impacting user confidence.

Customer Service

40%

Users appreciate the responsiveness and help provided by customer service when issues arose, especially regarding replacements and guidance on defects. However, this is seen as a necessary response to the mentioned quality issues rather than a benefit of the product itself.

Performance Issues

45%

Several reviews indicate significant performance issues, including failure to extract and feed, light primer strikes, and failure to reset the trigger. These problems undermine trust in the product's reliability, particularly for those relying on it for serious use.

Finish and Aesthetic Concerns

50%

While many users commend the nitride finish, there are notable concerns about discoloration and rust around the mounting holes, detracting from the product's overall presentation. Cleanliness upon arrival also varies, impacting first impressions.

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Great product

Ive had the slide over a year now. Purchased one of Brownells slides rather than sending mine off to be milled and coated. No problems switching from a 43, 43X or a 48. Ive used Glock barrels and a True Precision barrel now stays in it. Purchased a SCT frame on sale a few month later and have a complete gun. It felt a little gritty at first when working the slide. I thought i cleaned and lubed it well prior to shooting. One or two mags of ammo cured that. Wouldn't hesitate buying another.

Would you recommend this? Yes, I would recommend to a friend

by Todd on June 04, 2025

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Was this review helpful? 1

Great optoon to milling your factory slide

Fits and looks great. First time fully assembling a stripped slide. Wasn’t that hard. Hardest part was getting the spring caps on the firing pin assembly.

by EDWARD SIMPSON on March 10, 2024

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Was this review helpful? 1

Seems good so far.

A EPS Carry fit right on it. Seems well made, although i'm no gunsmith.

by Stephen Clauson on March 03, 2024

Verified Purchase

Was this review helpful? 1

Great fit, great price

Everything fit together perfectly. Used the factory Glock internals and paired it with a holosun 507k.

by Cody on July 22, 2023

Verified Purchase

Was this review helpful? 1

Perfect!

Easy swap out... everything fit like a glove. For a little more than the cost of milling your slide, you can have a backup "non optic" slide as well.

No Problems Whatsoever, Great 43X Slide

Fitment wasn't a problem at all on a factory Glock 43x/48 frame. Looks very nice, finish is great! I used a Brownell's branded 43X threaded barrel, factory Glock night sights & a Swampfox Sentinel Auto Adjusting, always on red dot and fitment was perfect there as well. USE THE SCREWS THAT CAME WITH THE SLIDE!

Perfect

It's exactly what you expect from Brownells. The slide arrived in perfect condition (no rust at all) 1 day after I ordered it. I stripped the parts from the stock Glock 43x slide and had zero trouble installing them in the Brownells slide. Went to the range today and shot 100 rounds flawlessly. Grouping was as good as the stock slide.

Great Product, could use little more QC

Love the nitride finish on this, definitely better than the stock Gen 4 finish. The mounting holes for the optic had rust in them (as pointed out by other reviewers) but came right out with a little cleaner and oil and some brushing. I would encourage Brownells to start checking their slides more before their shipped out. At least spray a little oil in there. Overall, it's a great slide that's perfect besides the mounting holes for the optic. Everything's in spec, the finish is great and it feels like a solid product. Wish it came with a cover plate though. Also, the slide is shipped bone dry so make sure you oil it up before installing. 9/10 or 4.5/5

Solid Aftermarket Frame Under $250

Reading other reviews, I was skeptical about how reliable this slide would be. But when it came in the mail it didnt have anytime if debris or rust in the screw holes like Ive seen from other reviews. I did have a few issues in the first 50 rounds down range. I had a couple misfires and cycling issues. But since putting another 150 rounds through the gun Ive had zero issues. No cycling problems, no light primer strikes. Smooth shootin. I know theres some mixed reviews so there might just be a QC issue with this specific slide but from my experience so far has been good after breaking in my 43x build.

Overall, good value

Originally purchased for use with a Shield RMSc dot. Worked fine. Included screws are marked #6-40 and were loose in the holes. Guess what? METRIC... M4 screws fit perfectly. Weird. Ordered M4 8mm screws from McMaster Carr. Switched to HS507K and used a Dremel to remove the two rear nubs that are in the way for the 507K, that's an easy 20 minute job with the right grinding wheel. Tested on G43 and G43X frames, works great. Would be 5 stars except for the hassle of discovering M4 threads and sourcing M4 screws elsewhere.