Glock 43X Review: 1,200 Round Concealed Carry Test (2026)

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Review: Glock 43X – The Concealed Carry Gold Standard

Our Rating: 8.5/10

• RRP: $499
• Street Price: $420-$470
• Caliber: 9mm Luger
• Action: Striker-fired, semi-automatic
• Barrel Length: 3.41″
• Overall Length: 6.50″
• Height (with magazine): 5.04″
• Width: 1.10″
• Weight (unloaded): 18.70 oz
• Weight (loaded): 23.07 oz
• Capacity: 10+1
• Frame Material: Black polymer
• Slide Material: Steel with nDLC finish
• Sights: Glock fixed polymer sights
• Safety: Safe Action system (trigger safety, firing pin safety, drop safety)
• Grip: Textured polymer, slim profile
• Made in: Smyrna, Georgia, USA / Deutsch-Wagram, Austria

Glock 43X Pros and Cons

Live Glock 43X Prices

Glock 43X Quick Take

I have carried the Glock 43X as my primary EDC for the better part of a year now. In that time, it has handled everything from 115gr Federal American Eagle to 147gr Federal HST hollow points without a single malfunction. Zero. Not one failure to feed, failure to eject, or light primer strike across 1,200+ rounds.

The 43X fills a gap that Glock left open for too long. The G43 was too small for many shooters to grip properly, and the G19 was too thick for comfortable all-day IWB carry in warm weather. The 43X threads that needle. It is 1.10″ wide (compared to the G19’s 1.26″) but offers a full grip that lets you get all four fingers on the gun.

Where it falls short is the same places Glock always falls short. The stock sights are garbage for anything beyond well-lit range sessions. The trigger works, but it will never make you smile. And at 10+1, you are giving up capacity to the P365 and Shield Plus, both of which pack more rounds into similar or smaller packages.

Best For: Shooters who want a slim, ultra-reliable carry gun with a real grip and a massive aftermarket. If you are willing to invest in Shield Arms S15 magazines and a set of proper night sights, the 43X transforms into one of the best concealed carry pistols money can buy.

Firearm Scorecard

Why Glock Built the 43X This Way

The Glock 43X exists because of a problem Glock created for themselves. When they released the G43 in 2015, they finally gave the market a single-stack 9mm. It was tiny, reliable, and sold like crazy. But the grip was so short that most adult males could only get two and a half fingers on it. Pinky extensions helped, but they added bulk and looked awkward.

Meanwhile, the G19 remained the gold standard for a “do everything” pistol. But at 1.26″ wide and 23.63 oz unloaded, it was too chunky for a lot of people to carry comfortably in the summer. Especially for anyone wearing fitted clothing or living in a hot climate where heavy cover garments are not an option.

Glock’s solution was straightforward. Take the G43’s slim slide (1.10″ wide) and marry it to a grip frame that matches the G19’s height. The result is a pistol that conceals almost as well as the G43 but shoots almost as well as the G19. The “Slimline” concept was born, and the 43X hit the market in January 2019 alongside the G48 (which uses the same frame but adds a longer barrel and slide).

The silver nDLC finish on the slide was a visual differentiator at launch, though Glock now offers all-black versions as well. More importantly, the 43X established a new magazine platform that Shield Arms would later exploit with their S15 steel magazines, turning this 10-round pistol into a 15+1 powerhouse. That aftermarket development alone has made the 43X one of the most popular carry guns in America.

How the Glock 43X Compares to Competitors

The micro-compact and slim-compact market is packed right now. Here is how the 43X stacks up against the guns it competes with most directly.

Glock 43X vs Sig Sauer P365 XL

The P365 XL is probably the 43X’s toughest competitor. It holds 12+1 in the standard magazine (15+1 with extended mags), comes with a flat trigger, and has an optic-ready slide on the base model. At roughly $580-$650 street price, it costs more, but you get more features out of the box.

Where the 43X wins is grip width and shootability. The Sig’s grip module is slightly wider through the middle, and I find the 43X’s grip angle more natural. The Glock also has a more proven long-term track record, though the P365 platform has matured significantly since its early teething problems. If raw capacity and factory features matter most, get the Sig. If you value the Glock ecosystem and plan to upgrade with Shield Arms mags anyway, the 43X is the better foundation.

Glock 43X vs Smith & Wesson M&P Shield Plus

The Shield Plus is the value play in this segment. At $350-$430 street, it matches or undercuts the 43X on price and comes with 13+1 capacity, a flat-face trigger, and front slide serrations. Smith knocked it out of the park with this one.

I have shot both extensively, and the Shield Plus has a better trigger from the factory. The 43X has a slightly slimmer overall profile and a larger aftermarket. Both are dead reliable. Honestly, this is one of those comparisons where you should handle both and buy whichever one fits your hand better.

Glock 43X vs Springfield Hellcat Pro

The Hellcat Pro packs 15+1 into a package that is barely larger than the 43X. It also comes standard with an optic-cut slide and a U-Dot sight system that is genuinely useful. At $550-$600, it costs a bit more than the 43X but offers more capacity without any aftermarket mods.

The 43X counters with a smoother shooting experience. The Hellcat Pro’s aggressive texturing can be abrasive during long range sessions, and the Glock’s grip angle tends to point more naturally for most shooters. The Springfield is the better “out of the box” package. The Glock is the better platform to build on.

Glock 43X vs Ruger MAX-9

The Ruger MAX-9 is the budget option here, coming in at $350-$400 street. It holds 12+1, has an optic-ready slide, and includes a thumb safety option. For the money, it is hard to beat.

The 43X feels more refined in the hand. The MAX-9’s trigger is heavier, the slide is snappier, and the overall fit and finish is a step below the Glock. But if budget is the primary concern and you do not plan to spend hundreds on aftermarket upgrades, the MAX-9 delivers 90% of the performance at 75% of the price.

Glock 43X vs Smith & Wesson CSX

The CSX is an oddball in this comparison because it uses an aluminum frame instead of polymer. That gives it a different feel in the hand and slightly more weight (19.5 oz unloaded). It holds 12+1 and has an ambidextrous thumb safety. Street price runs $500-$550.

I like the CSX for shooters who prefer a metal-framed gun and a manual safety. The trigger is crisp and the build quality is excellent. But it does not have anywhere near the aftermarket support of the 43X, and the thumb safety is a dealbreaker for some carry shooters. It is a niche pick, but a good one if it fits your preferences.

Technical Deep Dive

Frame

The 43X frame is polymer with Glock’s standard rough-textured finish. It is not as aggressive as the Gen 5 RTF texture found on the G19 or G17, but it provides adequate grip in dry and sweaty conditions. The frame is 1.10″ at its widest point, making it one of the slimmest options in this class.

The standard model features the two-tone silver nDLC finish on the slide that has become the 43X’s visual signature. I will admit it looks good, though some shooters prefer the all-black variant for a less conspicuous appearance. The grip length matches the G19 at 5.04″ tall (with magazine), giving you a full four-finger grip that makes a significant difference in control compared to the shorter G43.

Current production standard 43X models now include an accessory rail, bringing them closer to the MOS variant in features. Earlier production runs lacked the rail, so check if you are buying used. The rail accepts compact weapon lights like the Streamlight TLR-7 Sub.

Slide

The slide is steel with Glock’s nDLC (diamond-like carbon) finish, which is extremely durable and corrosion resistant. I have carried mine daily for months in humidity and sweat without a spec of rust or wear through the finish.

Current production 43X models now include front slide serrations, which was a welcome update. Earlier production runs only had rear serrations, so if you are buying used, check for this feature. The serrations provide good purchase for press checks and manipulations.

Trigger

The Glock 43X uses Glock’s standard Safe Action trigger. On my example, the trigger breaks at approximately 5.5 pounds with a fair amount of take-up and a mushy wall before the break. Reset is short and tactile, which is the one bright spot.

Let me be honest: the Glock trigger is not bad. It is predictable, consistent, and safe. But it is not good either. After shooting the flat-face triggers in the P365 XL and Shield Plus, the 43X trigger feels dated. The good news is that aftermarket trigger upgrades from companies like Apex, Overwatch Precision, and Johnny Glock can transform it. I installed an Overwatch Precision TAC trigger in mine and the improvement was immediate and significant.

Sights

The Glock factory fixed sights are polymer with a white dot front and a white outline rear. They work fine at the range in good lighting. In low light, they disappear entirely. For a pistol that many people will carry for self-defense, this is a real shortcoming.

I replaced mine with Ameriglo Bold night sights within the first week. Trijicon HD XR and Night Fision Optics Perfect Dot are also excellent choices. Budget around $80-$120 for a quality set of night sights and consider it a required upgrade, not an optional one.

Magazine System and Shield Arms S15

The stock 43X magazine is a single-stack steel unit holding 10 rounds. It is reliable and well-made, but 10 rounds is the gun’s biggest limitation on paper.

Enter Shield Arms. Their S15 magazine is a flush-fit, steel magazine that holds 15 rounds in the same form factor as the factory 10-round mag. It effectively turns your 10+1 Glock 43X into a 15+1 pistol with no increase in grip size. This is the single biggest reason the 43X has maintained its popularity despite competitors offering higher stock capacity.

There are a few caveats. The Gen 1 S15 magazines had some reliability issues, particularly with the last round not feeding correctly. The Gen 2 and Gen 3 versions have largely resolved these problems. You also need to swap the factory polymer magazine catch for Shield Arms’ steel magazine catch, because the steel S15 magazines will wear down the polymer catch over time. I have run four Gen 2 S15 mags for over 800 rounds total without a single issue after installing the steel mag catch.

At the Range: 1,200+ Rounds Tested

I put the 43X through a thorough testing regimen across multiple range sessions. My goal was to test it with a wide variety of ammunition types and in conditions that simulate real-world carry use, not just benchrest accuracy.

For the first 500 rounds, I ran the pistol bone stock with factory Glock magazines. I used Federal American Eagle 115gr FMJ, Blazer Brass 124gr FMJ, Winchester White Box 115gr FMJ, and Fiocchi 124gr FMJ for the bulk of the practice ammo. For defensive loads, I tested Federal HST 124gr, Federal HST 147gr, Speer Gold Dot 124gr, and Hornady Critical Defense 115gr. Every single round fed, fired, and ejected without issue.

The next 700+ rounds were split between factory magazines and Shield Arms S15 mags. I specifically ran several magazines of each defensive load through the S15 mags to verify reliability with the ammo I actually carry. Again, zero malfunctions. The S15 mags dropped free reliably and locked the slide back on the last round every time.

Recoil is manageable and predictable. The 43X is snappier than a G19 (less mass and a shorter barrel), but the full-size grip gives you enough to hold onto. Split times averaged 0.22-0.25 seconds at 7 yards during bill drills, which is respectable for a gun this size. I could keep all shots inside a 6″ circle at 15 yards shooting at a comfortable pace, and inside a 4″ circle at 7 yards shooting quickly.

One thing I noticed is that the 43X handles 124gr and 147gr ammo noticeably better than 115gr. The heavier bullets seem to cycle the slide more smoothly and produce a flatter recoil impulse. If you are choosing a carry load, I would lean toward 124gr Federal HST or Speer Gold Dot. Both performed flawlessly and grouped well.

Performance Testing Results

The 147gr Federal HST turned in the tightest groups, which tracks with my experience that heavier bullets tend to be more accurate in short-barreled pistols. The 43X is not a target pistol, but it is more accurate than most shooters will ever need for defensive distances.

Known Issues and Common Problems

No firearm is perfect, and the 43X has a few known issues worth discussing.

Shield Arms S15 Gen 1 reliability. Early Gen 1 S15 magazines had feeding issues, particularly failures to feed on the last round. Shield Arms addressed this with revised followers in Gen 2 and Gen 3. If you buy S15 mags today, make sure you are getting Gen 2 or later. And always install the steel magazine catch. Running steel mags against a polymer catch is asking for trouble.

Stock sight fragility. The polymer Glock Marksman sights can chip or break if the gun is dropped or banged around. Several owners have reported the front sight coming loose after extended use. Replace them with steel night sights and this problem goes away entirely.

Slide lock engagement with S15 mags. Some users report that the slide does not always lock back on the last round when using S15 magazines. In my testing, this was a Gen 1 issue that I have not experienced with Gen 2 mags. Ensure your steel mag catch is properly installed and your S15 mags are current generation.

Light primer strikes with hard-primered ammo. A small number of 43X owners have reported light primer strikes, particularly with certain lots of CCI Blazer aluminum-case ammo. I did not experience this in my testing, but it is worth noting. If it happens, a slightly heavier striker spring from Glock or an aftermarket supplier will fix it.

Parts, Accessories, and Upgrades

The Glock aftermarket is one of the biggest in the firearms world, and the 43X benefits fully from that ecosystem. Here are the upgrades I consider most worthwhile.

If I had to pick just three upgrades, it would be night sights, Shield Arms S15 magazines (with the steel mag catch), and a quality IWB holster. Those three changes transform the 43X from a good carry gun into a great one. A trigger upgrade is the logical next step after that.

For holsters, I have had the best experience with the Tenicor Velo 4 for appendix carry. It has excellent retention, a smooth draw, and manages to be comfortable even during long days. If you prefer strong-side carry, the Tulster Oath is a solid, affordable option. Make sure whatever holster you buy is specifically molded for the 43X, as G43 holsters will not fit properly due to the longer grip.

You can find many of these upgrades at Palmetto State Armory, Brownells, or Guns.com.

The Verdict

The Glock 43X is not the most feature-rich concealed carry pistol you can buy. It does not have the highest capacity, the best trigger, or the nicest sights out of the box. What it has is the thing that matters most in a carry gun: absolute reliability wrapped in a slim, shootable package with the largest aftermarket in the business.

After 1,200+ rounds and months of daily carry, the 43X has earned its spot in my rotation. With Shield Arms S15 mags bringing capacity to 15+1 and a set of proper night sights, it becomes genuinely difficult to find a better overall concealed carry platform. The P365 XL gives it a serious run for its money on features, and the Shield Plus beats it on value, but the 43X’s combination of slim profile, full grip, and bulletproof reliability is hard to argue with.

Final Score: 8.5/10

Best For: Concealed carry shooters who want a slim, proven platform they can build on. The 43X rewards investment in upgrades more than almost any other carry gun on the market. If you are willing to add night sights and S15 magazines, you end up with a 15+1, slim-profile, Glock-reliable carry pistol that punches well above its price point.

FAQ: Glock 43X

What is the difference between the Glock 43 and 43X?

The Glock 43 has a shorter grip that holds 6+1 rounds. The 43X uses the same slim slide but adds a longer grip frame that holds 10+1 rounds. The 43X is 0.87″ taller (5.04″ vs 4.25″) but otherwise shares the same width and barrel length. The 43X is significantly easier to shoot well because you can get a full grip on the gun.

What is the difference between the Glock 43X and Glock 48?

The 43X and 48 share the exact same frame. The difference is the slide and barrel. The G48 has a 4.17″ barrel (vs 3.41″ on the 43X) and a correspondingly longer slide, making it 7.28″ overall (vs 6.50″). The G48 gives you slightly better accuracy and velocity at the cost of a longer profile. They use the same magazines, including Shield Arms S15s.

Glock 43X vs Sig P365: Which is better?

The P365 (standard model) is smaller and holds 10+1 or 12+1 depending on the magazine. The 43X is slightly larger but has a more comfortable grip for most shooters. Both are excellent. The P365 wins on capacity per size. The 43X wins on shootability and aftermarket support. With Shield Arms S15 mags, the 43X jumps to 15+1, which tips the capacity advantage back in its favor.

Are Shield Arms S15 magazines reliable?

The Gen 2 and Gen 3 Shield Arms S15 magazines are reliable in my experience. Early Gen 1 mags had known feeding issues. Make sure you install the Shield Arms steel magazine catch (required for proper function with the steel magazines) and buy current-generation mags. I have run over 800 rounds through four Gen 2 S15 mags with zero issues.

Is the Glock 43X MOS worth the extra money?

Yes, in most cases. The MOS version costs about $50 more at street price and adds an optic-ready slide cut. Since current production standard models now include front serrations and a rail, the MOS upgrade is primarily about the optics cut. If you plan to mount a red dot at any point, the MOS version is worth the extra money.

What is the best ammo for the Glock 43X?

For self-defense, I recommend 124gr Federal HST or 124gr Speer Gold Dot. Both are proven defensive loads that function flawlessly in the 43X and offer consistent expansion and penetration. For practice, any quality 115gr or 124gr FMJ will work. Federal American Eagle and Blazer Brass are my go-to range ammo.

Can you dry fire a Glock 43X?

Yes. Glock pistols are safe to dry fire. The striker is designed to handle repeated dry fire without damage. That said, I still use snap caps for extended dry fire practice sessions just to be safe on the striker face. A pack of A-Zoom snap caps costs a few dollars and gives peace of mind.