COMPLETE SLIDE ASSEMBLIES FOR GLOCK 43®

COMPLETE SLIDE ASSEMBLIES FOR GLOCK 43® Reviews & Ratings

Fully Assembled, Complete Slide Assembly for New Builds or Upgrading Your Factory G43


Ready to build a new custom pistol or just upgrade your current Glock® 43? Top it off with our Complete Slide Assembly for Glock® 43, available in three configurations: with a premium match-quality barrel, a ½"-28 tpi threaded barrel to accept a sound suppressor, or with a ported barrel that vents through a window in the top of the slide to counteract muzzle rise and help you keep the sights on the target for subsequent shots. No need to install a bulky compensator on the muzzle, so your new comped pistol will still fit standard holsters for the Glock® 43.



These slides come fully assembled with the barrel and all the internal small parts installed, making this 407K Slide the ideal upgrade for your factory Glock® 43 pistol or the perfect "top half" for a brand-new custom gun built on a compatible frame from another manufacturer. It features a pre-cut slot for easy, secure, low-profile mounting of a reflex red dot sight that fits the Holosun 407K footprint. If you're not mounting a red dot at the moment, we've included a lightweight reinforced polymer cover plate to neatly fill the slot. This slide comes with standard-height front and rear sights, which can serve as your primaries or a backup "iron" sights when paired with a red dot sight.

  • Comes COMPLETE with barrel, front & rear sights, and small parts installed
  • Fits Glock® 43 pistols & clonesBuilt-in mounting slot for reflex sights with the Holosun 407k footprint
  • Optic slot cover plate & recoil spring assembly also included
  • Slide machined from 416 stainless steel billet, with a Black Nitride finish
  • Choice of Solid top slide with standard barrel or ½"-28 tpi threaded barrel, OR distinctive top Window slide with ported/compensated barrel


Each of our slides for Glock® starts life as a billet of 416 stainless steel that is machined to Glock® factory specifications inside, with a tough, extremely wear-resistant black Nitride finish. This slide fits standard Glock® factory G43 frames and compatible aftermarket frames. The match-quality barrel is machined from premium 416R stainless steel alloy. The muzzle of the threaded barrel has standard ½"-28 tpi threads. The ported barrel has eight ports angled to provide just the right counterforce to muzzle rise.


On the sides at the rear, you'll find distinctive wide, shallow cocking serrations that give excellent "purchase" to rack the slide, plus a mirrored set of serrations up front that aid in manipulating the slide to press-check the chamber. Both sets of serrations make it easy to manipulate your pistol's slide from any angle and in any position. Hey, we have to admit these serrations just look very cool, too!



Whether you're assembling a custom pistol to meet specific needs, or you're upgrading a factory Glock 43 for enhanced performance and versatility, a Brownells complete slide assembly is helps you complete your project quickly and easily!

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Reviews Summary
Overall, reviews for the COMPLETE SLIDE ASSEMBLIES FOR GLOCK 43® reflect a mix of satisfaction and frustration. While some customers appreciate the quality and fit, a significant number report serious issues like failures to feed and fire. Customer service receives praise, but concerns about reliability and performance persist among many users.
What Reviewers Are Saying
Quality and Fit
36%
Many reviewers note the quality of the slide, highlighting its good machining and aesthetics. Some have found the assembly to fit well on their guns without modifications, which speaks to its initial appeal and design integrity.
Reliability Issues
56%
A considerable number of customers reported persistent reliability problems, including failures to feed and fire. While some experienced initial malfunctions that improved with use, others expressed serious concerns about the assembly's consistent performance, leading to mixed experiences.
Customer Service
28%
Reviewers frequently complimented the customer service experience, noting quick responses and willingness to assist with issues. Several users shared positive interactions with tech support, especially when addressing malfunctions or product exchanges.
2
Replacement 43x slide
Quality looks nice and it is smooth, but gave failure to feed issues with 115 and 147gr remington ammo. Even swapped to a glock branded spring..
2
Wont load
Firing pin extended past the bolt face. Would not go into battery.
2
Failure to feed
Bought the ported option for my 43x. Ports work great, but after the 2nd mag it started having failure to feed issues. By the 5th mag it was unusable. Put the factory barrel in and no problems. Kept the slide on because the serrations were much better than the oem slide and mine is not a mos version.
2
Failure to Feed
Installed on an SCT lower frame. Had continuous failures to feed rounds. Moved the slide assembly to a PSA micro dagger frame, and to a genuine Glock 43x frame with the same result. Replaced the barrel with a Glock barrel and it functioned properly. You should consider the cost of a new barrel in the price of this item. I do not recommend.
2
Unreliable
Ill give 2 stars because the fit and finish look good, on the first assembly I received i was getting failure to geeds because the round was getting stuck under the firing pin, called the tech line (they were great) and said that shouldn't be happening and they sent me out a new assembly(great customer service). New assembly the exact same issue. I cannot recommend the slide assembly unless you are willing to try and work on the pistol yourself or have a smith look at it.
2
Needs work
Fit and finish look good, but went to the range and kept having failure to feed malfunctions. The rounds kept getting stuck under the firing pin. Called the teck line with brownells (they were great) and said that souldnt be happening. They sent me a brand new one (fantastic customer service) but again had the same issue. Found online people were having the same issue and the fix is they were snading a bevel on the bottom of the firing pin so the round would push it out of the way. I have a oem firing pin on the way because it has a bevel from the factory. This issue needs to be adressed by brownells imo.
2
Not Reliable
The upper looked great when i took it out of the package and I was excited. Inspected and lubed everything and headed to the range. Round 3 I had a malfunction. Figured it was just new. Continued to shoot and had several malfunctions. Ended up shooting 300 rounds and still was malfunctioning. Ammo was Speer 124gr Lawman, so it was not the ammo. Returned the item