The Glock 43X/48 Round Magazine in black is a factory 9mm 10 round magazine built for the slimline Glock 43X and Glock 48 pistols. Buying a genuine Glock 43X/48 Round Magazine rather than an aftermarket copy is the single easiest way to keep a carry pistol reliable. It carries part number 47818. Outpost Firearms stocks it for owners who want spares that simply work.
Why the Glock 43X/48 Round Magazine Is Worth Buying Factory
Magazines are where most semi-automatic reliability problems begin. Feed lip geometry, spring rate, follower shape, and body dimensions all have to be right, and small deviations that would be invisible on a bench show up as failures to feed at the worst possible time. Factory magazines are made to the same specification the pistol was designed around.
The 43X and 48 share a magazine, which is one of the smarter decisions in the slimline range. Both pistols use the same slim grip module with the same 10 round capacity, so a magazine bought for either will run in the other. If you own both, your spares pool is shared.
Features
- Factory Glock magazine, made to the specification the pistol was designed around
- 10 round capacity in 9mm
- Fits both the Glock 43X and the Glock 48 slimline pistols
- Black finish matching the standard pistol furniture
- Part number 47818 for straightforward reordering
- Durable polymer over steel construction typical of Glock magazine design
Ten Rounds in a Slim Grip
The slimline platform exists to solve a specific problem. Double stack compacts are excellent shooters but their grip width is what prints through a shirt, and for a lot of people that width is the reason concealed carry feels awkward. A single stack width grip carrying ten rounds is the compromise that made the 43X and 48 so popular.
Ten rounds plus one in the chamber is a serious capacity for a pistol this slim, and it is what separates these models from the smaller pocket sized options. That capacity is only useful if the magazines are trustworthy, which brings the conversation back to buying factory.
Carrying at least one spare is standard practice for good reasons. A malfunction that a magazine change fixes is far more common than running the gun dry, and a spare magazine is the fastest solution to both problems.
Maintenance, Rotation, and Storage
Strip your magazines periodically. Remove the floorplate, take out the spring and follower, wipe out lint and grit, and reassemble dry. Pocket lint is the enemy of carry magazines and it accumulates faster than most people expect.
Do not oil the inside of a magazine. Oil holds dust and turns into a paste that slows the follower, and a magazine that runs dry and clean will outperform one that has been lubricated every time.
Rotate your carry magazines rather than leaving the same one loaded indefinitely, and number them so you can track any that misbehave. Retire any magazine with damaged feed lips instead of trying to bend them back. You will find holsters, carriers, and more spares across our parts and upgrades category, and Glock lists factory part numbers for every model.
Buy Spares
One magazine is a pistol you cannot reload and cannot properly train with. Two is a minimum and three or more is sensible, especially if you take classes where reload drills eat through your supply. Keep your best magazines for carry, mark your practice magazines separately, and replace the practice ones as they wear.
A factory Glock 43X/48 Round Magazine is inexpensive relative to the pistol it feeds and to the consequences of a stoppage. Buy several, rotate them properly, and put the reliability question to bed permanently. Ships direct to your door, no FFL required.





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