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- Know your target and what’s beyond
Review: Glock 48 – The Slimline That Changed Glock’s Concealed Carry Game
Our Rating: 8.3/10
Specifications
- RRP: $449
- Street Price: $399–$449 (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: 10+1 (ships with two 10-round magazines)
- 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
Pros
- Slimmer than G19 while keeping a full 4.17″ sight radius for better accuracy
- Built-in beavertail eliminates slide bite and enables a higher grip
- MOS version ready for Shield RMSc, Holosun 407K/507K and similar micro dots
- Shield Arms S15 magazines transform capacity to 15+1 in the same slim frame
- Same grip module as G43X means shared holster compatibility
Cons
- Factory 10-round single-stack magazine is limiting vs double-stack competition
- Slim frame transmits more felt recoil than the thicker G19
- Factory sights are basic Glock polymer, immediate upgrade recommended
- Silver nPVD slide finish on standard model shows wear faster than nDLC
Glock 48 9mm
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.
Sig Sauer P365 XL
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.
Springfield Hellcat Pro
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.
S&W Shield Plus
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.
Glock 43X
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Glock 48 9mm
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.
Glock 48 9mm
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 – $45 each |
| Magazine Catch | Shield Arms Steel Mag Catch | Required for S15 mags, prevents aluminum catch wear from steel mag body | $25 – $35 |
| Sights | Ameriglo GL-429 (Suppressor Height) | Tritium night sights that co-witness with MOS-mounted red dots | $80 – $110 |
| Red Dot | Holosun 507K X2 | Best value micro dot for the Shield RMSc footprint, shake-awake, solar backup | $270 – $310 |
| Weapon Light | Streamlight TLR-7 Sub | Designed specifically for Glock Slimline rail, 500 lumens, flush fit | $120 – $145 |
| Holster | Tier 1 Concealed Axis Elite | Appendix IWB with sidecar, accommodates optic and weapon light | $140 – $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.
- Palmetto State Armory – Glock parts, magazines and accessories
- Brownells – Glock parts and gunsmithing supplies
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.
Glock 48 9mm
FAQ: Glock 48
Is the Glock 48 good for concealed carry?
The Glock 48 is one of the best concealed carry options available. At just 1.10 inches wide and 20.74 ounces, it is significantly slimmer and lighter than the Glock 19 while offering the same 4.17-inch barrel length. With Shield Arms S15 magazines, it holds 15+1 rounds in a slim frame that disappears in an appendix holster.
What is the difference between the Glock 48 and Glock 43X?
The Glock 48 and 43X share the same grip module and accept the same magazines. The difference is the slide: the G48 has a longer 4.17-inch barrel versus the G43X at 3.41 inches. This gives the G48 better accuracy and a longer sight radius. The G43X conceals slightly better due to its shorter muzzle. Both accept Shield Arms S15 15-round magazines.
Are Shield Arms S15 magazines reliable in the Glock 48?
Shield Arms S15 Gen 3 magazines are reliable in the Glock 48 after a brief break-in period of about 50 rounds. You must replace the factory aluminum magazine catch with the Shield Arms steel version, as the steel magazine body will wear through the aluminum catch over time. With the steel catch installed, S15 mags run reliably and increase capacity from 10+1 to 15+1.
What red dot fits the Glock 48 MOS?
The Glock 48 MOS uses the Shield RMSc footprint, which fits the Shield RMSc, Holosun 407K, Holosun 507K, and similar micro red dots without adapter plates. The Holosun 507K X2 is the most popular choice for its shake-awake feature, solar backup, and excellent value around $270 to $310.
How much does a Glock 48 cost?
The Glock 48 has an MSRP of $449, with street prices typically ranging from $399 to $449 depending on the retailer and variant. The MOS (optics-ready) version costs slightly more, usually around $499 to $549. Check our live pricing widget above for the best current deals from verified retailers.
Is the Glock 48 better than the Sig P365 XL?
Both are excellent concealed carry guns with different strengths. The P365 XL offers 12+1 capacity out of the box and a better stock trigger. The G48 has a longer barrel (4.17 inches vs 3.7 inches) for better accuracy, and with Shield Arms S15 magazines reaches 15+1 capacity. The G48 also benefits from a much larger aftermarket for parts, holsters, and accessories.
