Glock 48 Review: The Slimline 9mm That Changed Concealed Carry (2026)

Last updated September 2026 · By Nick Hall, who put 1,000+ rounds through the Glock 48 for this review

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Quick Answer: The Glock 48 is the slimline 9mm that changed concealed carry in 2019 and remains a top single-stack 9mm in 2026, an extended-grip evolution of the Glock 43X that adds a longer slide for improved sight radius while retaining the 1.1-inch slim-line profile.

Standard configuration: 4.17-inch barrel, 20.74 oz with an empty magazine, and 15+1 on current guns now that Glock ships a factory 15-round Slimline magazine. The Glock 48 MOS variant adds optic cut for direct-mount red dots. Reliability is gold-standard Glock, runs cleanly across mixed brass and steel-cased ammo. The longer slide pushes the front sight further from the eye for slightly better practical accuracy than the 43X.

The biggest mistake Glock 48 owners make is buying the gun without spare Shield Arms 15-round magazines. The factory 10-round mag is fine for plinking; the Shield Arms 15-round mag transforms the gun’s competitive position vs the Sig P365 XL. Run the Shield Arms mag with the factory mag catch upgrade for reliable function.

Table of Contents

Review: Glock 48, The Slimline That Changed Glock’s Concealed Carry Game

Our Rating: 8.3/10

Specifications

• RRP: $449
• Street Price: from $448 (Check our live pricing for the best current deal)
• Caliber: 9mm Luger
• Action: Striker-fired, semi-automatic (Safe Action)
• Barrel Length: 4.17 inches
• Overall Length: 7.28 inches
• Height: 5.04 inches
• Width: 1.10 inches
• Weight (unloaded): 20.74 oz
• Capacity: 15+1 on current guns, 10+1 on older stock
• Frame Material: Polymer (Slimline design, Gen 5 texture)
• Slide Material: Steel, nPVD silver finish (standard) or nDLC black (MOS)
• Sights: Fixed polymer (Glock standard), Ameriglo Bold on some models
• Optics: MOS version available (Shield RMSc footprint)
• Safety: Safe Action system (trigger safety, firing pin safety, drop safety)
• Grip: Built-in beavertail, no finger grooves, same grip as G43X
• Made in: Smyrna, Georgia, USA

Quick Take

The Glock 48 is Glock’s answer to a question millions of concealed carriers were already asking: what if the G19 went on a diet? Same barrel length, same sight radius, but significantly slimmer and lighter. I’ve been carrying one for the better part of two years now, and it has become my default appendix gun for good reason.

In 2026, the G48 has found its audience as the Goldilocks Glock for concealed carry. Longer barrel than the G43X for accuracy, slimmer than the G19 for comfort, and with Shield Arms S15 mags it matches the G19’s capacity. It’s the gun that proved Glock could make something other than a brick.

The weak spots are real. Factory capacity is just 10+1, the stock sights are typical Glock plastic, and the silver nPVD finish on the standard model wears faster than I’d like. But those are all solvable problems. Shield Arms S15 mags fix the capacity. A set of Ameriglo sights takes five minutes to install. And if you buy the MOS version, you get the better nDLC finish anyway.

Best For: Concealed carry shooters who want a longer sight radius than micro-compacts but can’t comfortably conceal a G19. Especially good for appendix carry and shooters with smaller hands.

Why Glock Built the Glock 48 This Way

After the G43 proved that single-stack Glocks would sell, Glock saw a gap in their own lineup. The G43 was tiny but hard to shoot well. The G19 was accurate but too thick for comfortable all-day concealed carry, especially appendix. There was nothing in between.

The G48 was Glock’s answer: keep the G19’s barrel length and sight radius, but slim everything down to single-stack width. Released at SHOT Show 2019 alongside the G43X (same grip, shorter slide), it immediately carved out a niche that no other Glock occupied.

The MOS version came later, responding to the red dot revolution that was sweeping concealed carry. Glock used the Shield RMSc footprint, which also fits the Holosun 407K and 507K. It was a smart call. Those micro dots are everywhere now.

Then Shield Arms changed the entire calculus with the S15 magazine. A flush-fit 15-round magazine in a gun designed for 10 rounds. Suddenly the G48 matched the G19 on capacity while staying dramatically slimmer. That single aftermarket part arguably made the G48 the most relevant Glock for concealed carry in 2026.

Competitor Comparison

Sig Sauer P365 XL (~$549)

The most direct competitor to the G48, and in many ways the better gun on paper. The P365 XL gives you 12+1 standard capacity, an optics-ready slide, and a slightly shorter overall length. Sig’s flat trigger is better out of the box than the Glock’s.

But the G48 with Shield Arms S15 mags beats it on capacity (15+1 vs 12+1), and the G48’s longer barrel gives it a slight accuracy edge. The P365 XL is the better gun if you’re buying one gun and running it stock. The G48 is the better gun if you’re already in the Glock ecosystem and willing to invest in Shield Arms magazines.

Springfield Hellcat Pro (~$549)

The Hellcat Pro packs 15+1 capacity in a slightly shorter package than the G48. The trigger is excellent, the U-Dot sight system works well, and it ships optics-ready. It matches the G48 with Shield Arms on capacity right out of the box, without needing aftermarket magazines.

Where it loses is aftermarket depth. Glock’s accessory universe dwarfs Springfield’s. If you want infinite holster, sight, and parts options, the G48 wins. If you want maximum capacity with zero upgrades required, the Hellcat Pro is hard to beat.

Smith & Wesson M&P Shield Plus (~$449)

The Shield Plus is the value play in this class. At a similar price to the G48, you get 13+1 capacity and a genuinely good trigger. Smith nailed the ergonomics on this one. It’s a great gun that doesn’t get enough credit.

The G48’s advantages are barrel length (4.17″ vs 3.1″) and Glock’s aftermarket depth. The Shield Plus is the better value out of the box. The G48 is the better platform to build on over time.

Glock 43X (~$479)

Same grip, shorter slide. If you’re choosing between the two, the decision comes down to barrel length versus concealment. The G48’s longer slide gives you a better sight radius and slightly more velocity. The G43X tucks away a little easier under a t-shirt.

Both accept Shield Arms S15 mags, both share holster compatibility for the grip, and both shoot similarly. In my experience, the G48 is the better shooter. The G43X is the better pure carry gun. If I could only have one, I’d take the G48 for the accuracy edge.

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Features: What Makes the G48 Different

The Slimline Concept

At 1.10 inches wide, the G48 is dramatically thinner than the G19’s 1.34 inches. That quarter-inch doesn’t sound like much on paper, but in an appendix holster it’s the difference between printing and disappearing. The G48 carries like a single-stack but, with the right magazine, performs like a double-stack.

Glock achieved this by using a single-stack magazine well and a narrower slide. The tradeoff is obvious: factory capacity drops from 15+1 to 10+1. But Glock kept the barrel length at 4.17 inches, which means you’re getting G19-level sight radius and ballistic performance in a slimmer package. That barrel length decision is what separates the G48 from every micro-compact on the market.

G48 vs G43X: Same Grip, Different Mission

The G48 and G43X share an identical grip module. Same width, same height, same magazine compatibility. The difference is all in the slide. The G48’s slide is 0.86 inches longer, giving it that full 4.17-inch barrel versus the G43X’s 3.41 inches.

In practice, that longer slide means better accuracy at distance and a slightly longer sight radius for faster target acquisition with irons. The G43X conceals marginally better because of the shorter muzzle. If you’re running a red dot and prioritize accuracy, get the G48. If pure concealment is the priority, the G43X makes more sense.

MOS and Optics

The G48 MOS uses a direct-milled slide cut for the Shield RMSc footprint. This means it accepts the Shield RMSc, Holosun 407K, Holosun 507K, and similar micro red dots without adapter plates. The optic sits low and close to the bore axis, which is exactly what you want on a carry gun.

I’ve been running a Holosun 507K on my G48 MOS for about a year. The fit is solid, the co-witness with Ameriglo suppressor-height sights works perfectly, and the optic has held zero through thousands of draws and several hundred rounds. If you’re buying a G48 in 2026, get the MOS version. The nDLC black finish alone is worth the upgrade over the standard silver nPVD.

Shield Arms S15 Magazines: The Game Changer

Shield Arms took a 10-round single-stack magazine well and engineered a 15-round flush-fit magazine into it. The S15 Gen 3 is the current version, and it works. I’ve run four of them through my G48 with zero feeding issues across several thousand rounds of mixed ammo.

There is one critical requirement: you must replace the factory aluminum magazine catch with Shield Arms’ steel magazine catch. The S15’s steel body will chew through the OEM aluminum catch in a few hundred reloads. This is non-negotiable. Buy the steel catch when you buy the magazines. With S15s installed, the G48 goes from 10+1 to 15+1, matching the G19’s capacity in a package that’s a quarter-inch slimmer.

Safe Action System

The G48 uses Glock’s standard Safe Action trigger system: a trigger safety tab, a firing pin safety, and a drop safety. It’s the same proven system that’s been in every Glock for decades. The trigger pull runs around 5.5 to 6 lbs with a short reset. It’s not the best trigger in the carry gun market (Sig and Walther both do better), but it’s predictable and consistent.

Rail and Accessories

Later production G48 models (and all MOS versions) include a slim accessory rail on the dust cover. This rail is designed specifically for the Streamlight TLR-7 Sub, which was built for Glock’s Slimline series. The TLR-7 Sub fits flush with the G48’s slide width and doesn’t add significant bulk to the carry package.

If you’re running a weapon light on your carry gun (and in 2026, you should be), the G48 MOS with a TLR-7 Sub is one of the most compact light-bearing setups you can build. Most major holster makers now offer G48 MOS + TLR-7 Sub specific molds.

Performance Testing Results

Reliability (9/10)

It’s a Glock. It runs. I’ve put well over 2,000 rounds through my G48 across two years of carry and range sessions. Zero malfunctions with factory Glock magazines. Zero malfunctions with Shield Arms S15 mags after the first 50 rounds of break-in. The gun eats everything from cheap Blazer Brass 115gr to Speer Gold Dot 124gr +P without complaint.

The only caveat is that the slim slide has slightly less mass than the G19, which means the recoil spring has to do more work. I’ve heard of occasional issues with very weak-loaded range ammo, but I’ve never experienced it personally. Stick with standard-pressure or +P defensive ammo and you won’t have problems.

Accuracy (8/10)

The 4.17-inch barrel gives the G48 a meaningful accuracy advantage over micro-compacts like the P365 and Hellcat. At 15 yards from a bench, I consistently shoot 2.5 to 3-inch groups with Federal HST 147gr. Standing unsupported at 7 yards, everything stays inside 3 inches shooting at a reasonable pace.

The longer sight radius helps with iron sights, and adding a Holosun 507K tightened my groups by roughly half an inch at 15 yards. For a carry gun, this is more than adequate. You’re not going to win a bullseye match with it, but you’ll put rounds exactly where they need to go at defensive distances.

Ergonomics (8/10)

The built-in beavertail is a genuine improvement over older Glock designs. It eliminates slide bite and lets you get a high grip on the gun without worrying about the slide chewing up your hand. The Gen 5 texture is grippy enough for shooting but won’t destroy your skin during 12 hours of appendix carry.

The slim frame fits smaller hands better than the G19, and the lack of finger grooves means you can position your grip naturally. The grip angle is still classic Glock, which is either fine or terrible depending on who you ask. If you like how a G19 points, you’ll like the G48. If Glock’s grip angle has always bothered you, the G48 won’t change your mind.

Fit and Finish (7/10)

The standard G48’s silver nPVD finish is distinctive, but it shows wear faster than I’d prefer. After six months of daily appendix carry, my original standard model had visible holster wear on the slide. The MOS version’s nDLC black finish holds up significantly better, which is one more reason to spend the extra money on the MOS.

Internal quality is what you’d expect from Glock: functional, utilitarian, and built to last. The barrel lockup is tight, the slide-to-frame fit is consistent, and nothing feels loose or cheap. It’s not a beauty queen, but it’s a Glock. You’re buying it for function, not aesthetics.

Known Issues and Problems

The G48 is a reliable gun, but it has some quirks you should know about before buying.

Silver nPVD Finish Wear

The standard G48’s silver nPVD finish looks great out of the box, but it wears faster than Glock’s nDLC black finish. Daily carry will produce visible holster marks within months. This is cosmetic, not functional, but it bothers some people. The fix is simple: buy the MOS version, which comes with the nDLC finish.

Shield Arms S15 Magazine Catch Requirement

If you run Shield Arms S15 magazines (and most G48 owners do), you must replace the factory aluminum magazine catch with Shield Arms’ steel version. The steel magazine body will wear through the aluminum catch over time, causing magazines to drop free unexpectedly. This is well-documented and Shield Arms sells the steel catch specifically for this reason. Budget an extra $30 when you buy your S15 mags.

Increased Felt Recoil

The slim frame and lighter slide mean the G48 has noticeably more felt recoil than the G19, especially with +P loads. It’s not unmanageable, but shooters coming from a G19 will notice the difference. Extended range sessions with hot ammo can fatigue your hands faster than a thicker-framed gun.

Early MOS Optic Plate Screws

Some early-production G48 MOS models had issues with loose optic plate screws. The fix is straightforward: use a drop of blue Loctite on all optic mounting screws and torque to manufacturer spec. Later production runs seem to have addressed this, but it’s still good practice to Loctite any optic screws on any gun.

Factory Trigger

The G48’s trigger is adequate but not exceptional. It’s the standard Glock Safe Action pull with some creep before the wall. Compared to the Sig P365 XL or Walther PDP triggers, it feels mushy. Most shooters adapt to it quickly, and the aftermarket has dozens of trigger options if it really bothers you. But out of the box, the competition does better here.

Parts, Accessories and Upgrades

The G48 benefits from Glock’s massive aftermarket ecosystem. Here are the upgrades I actually recommend based on running this gun daily for two years. Check our Glock parts and accessories guide for more options.

Recommended Upgrades

Upgrade Category	Recommended Component	Why It Matters	Cost Estimate
Magazines	Shield Arms S15 Gen 3	15-round flush-fit capacity upgrade, the single best G48 upgrade you can make	$35 to $45 each
Magazine Catch	Shield Arms Steel Mag Catch	Required for S15 mags, prevents aluminum catch wear from steel mag body	$25 to $35
Sights	Ameriglo GL-429 (Suppressor Height)	Tritium night sights that co-witness with MOS-mounted red dots	$80 to $110
Red Dot	Holosun 507K X2	Best value micro dot for the Shield RMSc footprint, shake-awake, solar backup	$270 to $310
Weapon Light	Streamlight TLR-7 Sub	Designed specifically for Glock Slimline rail, 500 lumens, flush fit	$120 to $145
Holster	Tier 1 Concealed Axis Elite	Appendix IWB with sidecar, accommodates optic and weapon light	$140 to $170

For Glock parts and accessories, we recommend Palmetto State Armory and Brownells. PSA is best for quick delivery and competitive pricing. Brownells has the deeper gunsmithing selection.

• Our Glock parts price comparison covers parts, magazines and accessories across every retailer we track
• Our Glock sights and upgrades guide ranks the parts worth fitting first

Glock 48 Specs, and What the MOS Changes

Glock’s own published data for both versions, side by side, from its G48 and G48 MOS technical data. Every dimension is identical. The only thing that changes is the weight, and it changes in the direction most people do not expect.

Spec	Glock 48	Glock 48 MOS
Barrel length	106mm / 4.17in	106mm / 4.17in
Overall length	185mm / 7.28in	185mm / 7.28in
Slide length	174mm / 6.85in	174mm / 6.85in
Overall width	28mm / 1.10in	28mm / 1.10in
Slide width	22mm / 0.87in	22mm / 0.87in
Height with magazine	128mm / 5.04in	128mm / 5.04in
Sight radius	152mm / 5.98in polymer, 151mm / 5.94in steel, 150mm / 5.91in night sights
Trigger distance	67mm / 2.64in	67mm / 2.64in
Trigger pull	24N, about 5.4lb	24N, about 5.4lb
Weight, no magazine	524g / 18.48oz	519g / 18.31oz
Weight, empty magazine	588g / 20.74oz	584g / 20.60oz
Weight, loaded	712g / 25.12oz	708g / 24.97oz
Street price	from $448	from $485

The MOS is the lighter gun. Not by much, 0.17oz bare, but it is the opposite of what people assume, because they picture an optic cut as something added rather than something milled away. Put a red dot on it and you hand that back several times over, so the number is trivia rather than a buying argument. It does tell you the specs on this page were read rather than copied.

The other number worth pulling out is the slide width of 0.87in. The 1.10in overall figure is measured across the widest external control, and the slide is what prints through a shirt. That is the whole Slimline argument in one measurement.

Ignore the 10-round figure on Glock’s website

Glock’s own G48 page still lists “Mag. Capacity Standard: 10”. That is out of date. Glock announced factory 15-round Slimline magazines for the 43X, the 48 and the G44 at the NRA Annual Meetings in April 2026, with guns shipping from May. The magazine has a metal double-stack body and works with the standard polymer magazine catch, so unlike the aftermarket Shield Arms S15 route there is no steel catch to fit first.

So a new 48 should arrive as a 15+1 gun. Older stock on a shelf may still be 10-round. Ask before you pay, because it is the difference between a carry pistol that matches a Glock 19 on capacity and one you will immediately spend another $100 fixing.

Glock 48 Variants: Standard, MOS and the 43X

Three guns share this frame, and the choice between them is simpler than the model numbers suggest.

The 48 and the 43X take the same magazines and the same holsters in most cases. If you already own one, the other is a barrel length away rather than a new platform.

Who Should NOT Buy the Glock 48

• Anyone who wants maximum capacity in the same size. A Glock 19 Gen 6 is barely longer, a quarter of an inch wider, and carries 15+1 without argument. If the gun lives in a bag rather than on your waist, take the 19.
• Deep concealment carriers. The 48’s 4.17in barrel buys sight radius you may not want. The Glock 43X is the same frame with three quarters of an inch less muzzle, for the same money.
• Shooters who want a factory threaded barrel. Glock does not offer one for the Slimline guns. You are into aftermarket barrels before you can run a suppressor.
• Anyone buying on price alone. At $448 the 48 sits above a PSA Dagger and roughly level with a Glock 19 Gen 5 at $530. It is not the budget option, it is the slim option.
• People who hate reloading a single stack. Even at 15+1 the magazine is narrower and stiffer to load than a double stack. Buy a loader with the gun.

The Verdict

The Glock 48 carved out a niche that didn’t exist before it arrived: a Glock with G19 accuracy in a package slim enough to carry all day without thinking about it. It’s not the most feature-rich carry gun on the market. It’s not the highest capacity out of the box. And the factory trigger won’t win any awards.

But with Shield Arms S15 magazines, it arguably makes the G19 redundant for concealed carry. You get 15+1 rounds in a frame that’s dramatically easier to conceal, with the same barrel length and sight radius. Add a Holosun 507K and a Streamlight TLR-7 Sub, and you have one of the most capable concealed carry setups money can buy.

Final Score: 8.3/10. The G48 is the thinking person’s Glock. It rewards shooters who are willing to invest in the right upgrades, and it disappears under a t-shirt better than any full-barrel-length Glock ever has. Find the best price through our recommended online gun stores.

Best For: Concealed carry (especially appendix carry), shooters who want G19 sight radius in a slimmer package, anyone running Shield Arms S15 magazines who wants maximum capacity in a minimum footprint.

FAQ: Glock 48

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