Every few weeks a student sets a Glock 48 and a Glock 43X on my range table side by side and asks me which one they should buy. Half the time they’ve already read three online comparisons and gotten three different answers, because most of those articles bury the one number that actually matters under a pile of specs nobody needs. I’ve carried both of these guns, taught with both of them, and watched a lot of ordinary people shoot them for the first time. The Glock 48 vs 43X question has a real answer, and it isn’t “they’re basically the same gun.”
They’re close. Same width, same grip, same trigger, same controls, interchangeable magazines. But the slide length difference changes how each one carries and how each one shoots enough that the choice should come down to your build and your holster setup, not a coin flip.
What’s actually different between the Glock 48 and Glock 43X
Strip away the marketing and there’s really one dimension that separates these two pistols: barrel and slide length. The Glock 48 runs a 4.17-inch barrel and a 6.85-inch slide, weighing 20.74 ounces with an empty magazine. The 43X uses the shorter Glock 43 slide and barrel, 3.41 inches, and comes in around 18.7 ounces empty, per Pew Pew Tactical’s testing. Everything else, grip width at 1.1 inches, height at 5.04 inches, magazine capacity, trigger geometry, is identical. Glock built these as two lengths of the same gun, not two different guns, and that’s worth remembering when you’re comparing spec sheets that make them look like separate product lines.
Weight and how it actually carries on your belt
Two ounces doesn’t sound like anything until you’ve had a gun on your hip for ten hours in August. Here’s what I’ve found teaching in Florida heat: the extra two ounces on the 48 sits out toward the muzzle, not at the grip, so a gun that’s belted on rides a little more level and a little less muzzle-heavy toward your body than you’d expect from the number alone. Harry’s Holsters makes the same point from their own testing: worn with a good belt, the 48 carries better over long days because that added weight balances the gun instead of just adding bulk. Ditch the belt, wear it in gym shorts with a clip holster, and the equation flips. That extra two ounces becomes dead weight with nothing anchoring it, and the 43X’s lighter build wins outright.
So the real question isn’t “which one is lighter.” It’s “are you a belt-and-holster carrier or a clip-in-the-waistband carrier.” Most of my serious CCW students in Palm Beach County are the former, because a good gun belt is cheap insurance against a sagging holster in 95-degree heat. If that’s you, the 48’s extra ounces work in your favor rather than against you.
I’d also push back gently on a habit I see constantly in this hobby: buying the lighter gun automatically because lighter sounds better on paper. Weight is not a pure downside in a carry pistol. A gun with a little more mass in the slide recoils a hair softer, and that shows up over a long class day when someone’s put two or three hundred rounds through it. I’ve had students switch from a 43X to a 48 mid-class specifically because their hand was getting tired faster on the lighter gun’s snappier recoil impulse, not because either gun was uncomfortable to hold.
Concealment under a Florida t-shirt
This is the section people actually care about, and it’s simpler than the spec sheets make it look. Both guns are 1.1 inches wide at the grip, so side-to-side printing is a wash. The difference shows up in the muzzle. The 43X’s shorter slide tucks completely under most cover garments even with a short shirt hem, while the 48’s longer barrel occasionally peeks past the bottom of a tucked-in polo if you’re carrying appendix and you’re on the shorter side. I’ve had students in my classes with shorter torsos do noticeably better concealing the 43X specifically because of that half-inch to inch of extra slide length showing through thin, hot-weather clothing. If you live in shorts and un-tucked golf shirts nine months a year like most of South Florida does, that half inch matters more here than it would in a place where people wear jackets.
Trigger, sight radius, and what that means for your groups
The triggers are the same part, same pull weight, same reset, and I can’t tell them apart blind. What’s different is sight radius, and this is where the spec sheet actually predicts real shooting behavior. The 48’s longer slide gives roughly three-quarters of an inch more distance between front and rear sight, and at 25 yards that translates into a real, visible accuracy edge. Harry’s Holsters reports shooting more precisely with the 48 at that distance and slower pace of fire, while doing better with the 43X’s shorter sights up close, inside 12 yards, because the shorter slide shows less sight wobble under speed. I’ve watched that exact pattern play out on my own range. New shooters doing slow, deliberate fundamentals work at 15 yards or more tend to shoot flatter groups with the 48. Students working close-range, draw-and-fire drills inside ten yards often do just as well or better with the 43X, because there’s less gun to track visually when things speed up.
Reliability: two guns, same platform, same track record
I haven’t had a malfunction with either gun that wasn’t caused by a bad or worn aftermarket magazine, and that lines up with what’s been published. Hook & Barrel ran two 43X pistols through nearly 600 rounds combined, including plate racks, moving targets, and a 60-round timed proficiency test, and came away with zero malfunctions and a perfect score on both guns. Refactor Tactical’s Glock 48 test put 200 rounds through a cold gun at 37 degrees with no misfeeds, misfires, or jams. Different climate, different gun, same story you’ll hear from almost every credible outlet: these run. That’s not an exciting sentence to write in a gear review, but it’s the correct one, and it’s exactly why instructors keep two of the most boring, most reliable Glocks in the industry on their own belts.
The magazine situation just changed, and it matters
For years the honest complaint about both guns was capacity. Ten rounds in a single-stack-width gun felt thin next to a double-stack 43X-sized competitor. Shield Arms addressed that with their S15 steel magazine, a $42 aftermarket part that adds five rounds without extending past the factory magazine’s length, according to Refactor Tactical’s breakdown. That’s been the workaround for a while, but it came with a real caveat: the factory polymer magazine release wears down faster under steel Shield magazines, and most people running them long-term swap in a steel release to avoid problems. As of April 2026, Glock made that whole workaround less necessary by announcing factory 15-round OEM magazines for both the 43X and 48, with dealer availability starting in May, as Hook & Barrel reported. If you’re buying new right now, ask your dealer whether the 15-round mags are in stock. It’s a meaningfully better carry gun than it was two years ago, same size, half again the ammunition on board.
What I actually carry, and what I tell my students
I lean 48. Not because the 43X is worse, but because most of my carry is appendix inside the waistband with a real gun belt, and that’s exactly the setup where the 48’s extra length and weight pay off in sight radius without costing me anything in comfort. But I don’t hand every student a 48 and call it settled. If someone’s build runs short-waisted, or they’re carrying strong-side without a stiff belt, or their wardrobe is mostly untucked t-shirts and gym shorts, I’ll steer them to the 43X and mean it. This is one of the few genuine “it depends on your body and your wardrobe” answers in concealed carry, not a hedge.
One more thing worth saying plainly: neither pistol is a mistake. I’ve never had a student regret buying either one, and that’s rare in this business. The stuff people actually complain about after a year of carry, the factory plastic sights and the polymer magazine release wearing under steel aftermarket mags, applies equally to both guns and neither one is a dealbreaker. Budget for a set of better sights eventually. Most people do, on almost every striker-fired carry gun on the market, not just these two.
Who should skip both of these
If you need real speed on close targets and you’re not planning to shoot much past ten yards, a compact double-stack like a Glock 19 will outrun either Slimline gun on capacity and probably on splits too, at the cost of being a little wider to conceal. And if you have small hands and find even the Slimline’s grip a stretch, that’s a fit problem neither the 48 nor the 43X solves, no matter how good the trigger is. A gun you can’t get a full, consistent grip on will always shoot worse than a smaller gun that fits, regardless of what the reviews say about either one.
What Florida law does and doesn’t change here
Capacity, barrel length, and magazine choice on either of these pistols don’t run into any Florida-specific restriction; the state doesn’t cap standard-capacity magazines the way some others do. This is general education, not legal advice, and if you have questions about carrying a specific configuration, a Florida firearms attorney or your concealed weapon license paperwork is the actual authority, not a blog post.
What ammo choice does and doesn’t change
Neither gun cares much what you feed it, within reason. Both run standard-pressure 9mm ammunition reliably according to the testing above, and I’ve seen the same in class with everything from cheap steel-case range ammo to premium defensive loads. Where it matters is recoil impulse on the lighter 43X. A heavier defensive round with more recoil will feel snappier in the lighter gun than the same round feels in the 48, simply because there’s less mass soaking it up. If you’re going to carry a hot defensive load and you’re recoil-sensitive, that’s one more small point in the 48’s favor. It’s not a reason to avoid the 43X, just something to actually shoot and confirm for yourself with your carry ammo before you trust either gun with your life, rather than assuming the gun that felt fine with practice ammo will feel the same with your defensive rounds.
What to actually do next
Handle both before you buy either one. Every gun shop worth walking into will let you dry-handle a 48 and a 43X back to back, and five minutes of that will tell you more than any spec table, including this one. If you’re in Boynton Beach, Wellington, Port St. Lucie, Stuart, Okeechobee, or Broward County, bring whatever you’re considering, or borrow one of mine, to a Protector Level 1 class and shoot it under a real timer instead of guessing from a table on your phone. Call me at (561) 213-2974 or email Mike@suburbanprotector.com and we’ll get you on the range with both.
Sources
Glock 48 official product page, Glock Ges.m.b.H.
Glock 43X Review, Pew Pew Tactical
How The G43x Performs, Hook & Barrel Magazine
Glock 48 vs 43x, Harry’s Holsters
Glock 48 Review: Is It Glock Perfection?, RE Factor Tactical