Description
The GLOCK 43X 9mm 10rd MOS FS BLK gives you the slim, easy-to-conceal profile of a subcompact with the capacity and sight-mounting versatility of a full-size duty gun. It’s the pistol I recommend most often to families and new shooters who want a reliable everyday carry piece that doesn’t feel punishing at the range. Factory fresh, with a black finish and the MOS (Modular Optic System) cut already milled into the slide, this 9mm ships with two 10-round magazines and is ready to hit the range right out of the box.
| Manufacturer | GLOCK |
|---|---|
| Model | 43X MOS FS |
| Material | Polymer frame, steel slide with nDLC finish |
| Compatibility | GLOCK 43X magazines (10-round factory, aftermarket 15-round options available) |
| Finish | Black nDLC |
| Weight | 18.5 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- MOS (Modular Optic System) – Why it matters: You can mount a miniature red dot sight directly to the slide without sending it to a machine shop, which means faster target acquisition and easier shooting for newer family members.
- 10+1 Round Capacity – Why it matters: The slim single-stack grip keeps the 43X easy to conceal, yet you still get ten rounds on tap—enough for defensive confidence without the bulk of a double-stack.
- GLOCK Marksman Barrel (GMB) – Why it matters: The enhanced rifling and crowned muzzle improve accuracy beyond standard GLOCK barrels, helping you and your family shoot tighter groups at the range.
- nDLC Finish – Why it matters: This tough, corrosion-resistant coating protects the slide from sweat, moisture, and holster wear, so your pistol stays looking good for years of daily carry.
- Reversible Magazine Catch – Why it matters: Left-handed shooters in your family can swap the catch in minutes, making the pistol truly ambidextrous and comfortable for everyone.
Who It’s For
This GLOCK 43X is built for the shooter who wants a slim 9mm that’s easy to carry but still fun to shoot. It’s ideal for new shooters who appreciate the low recoil and simple controls, families looking for a shared defensive pistol that fits different hand sizes, and experienced concealed carriers who want a modern optic-ready platform without the weight of a full-size gun.
Pros & Cons
- Pros: Slim grip fits smaller hands, MOS cut saves optic-mounting costs, 10-round flush magazines for reliable concealment, GLOCK’s legendary reliability out of the box.
- Cons: The factory 10-round capacity is lower than some competitors’ 15-round slim options; aftermarket 15-round magazines exist but may require a magazine catch swap for full reliability.
Comparison: GLOCK 43X vs. Zev Technologies OZ9 vs. Agency Arms Syndicate
| Feature | GLOCK 43X | Zev Technologies OZ9 | Agency Arms Syndicate |
|---|---|---|---|
| Capacity | 10+1 | 17+1 (double-stack) | 15+1 |
| Weight (unloaded) | 18.5 oz | 24.5 oz | 22 oz |
| Optic Ready | Yes (MOS) | Yes (RMR-cut) | Yes (RMR-cut) |
| Price | $507.56 | $1,400+ | $1,200+ |
| Best For | Budget-friendly, lightweight carry | Competition & precision shooting | High-end duty & custom builds |
If you want a no-fuss, reliable carry gun that leaves money in your pocket for ammo and training, the GLOCK 43X is your best bet. The Zev and Agency options are fantastic for shooters who demand race-gun performance, but they cost more than twice as much and weigh significantly more.
Frequently Asked Questions
What is GLOCK 43X MOS?
The GLOCK 43X MOS is the factory optic-ready version of the slimline 43X. MOS stands for Modular Optic System, which is a milled recess in the slide with threaded mounting holes that let you attach popular miniature red dot sights (like the Trijicon RMRcc, Holosun 507K, or Shield RMSc) without buying an aftermarket adapter plate or sending the slide to a machinist.
Which is better, GLOCK 43X or GLOCK 48?
The GLOCK 43X and GLOCK 48 share the same grip frame and magazine capacity, but the 48 has a longer slide and barrel (4.17 inches vs. 3.41 inches). The 43X is easier to conceal and carries a bit lighter, while the 48 gives you a longer sight radius and slightly higher velocity. For most family shooters, the 43X is the better choice because it’s more comfortable to carry all day. If you plan to shoot at the range more often and don’t mind the extra barrel length, the 48 is worth a look.
Is the GLOCK 43X mass compliant?
Yes, the GLOCK 43X is compliant with Massachusetts’ Attorney General regulations. It meets the state’s point system requirements and is available for purchase by MA residents through licensed dealers. Always check with your local FFL to confirm current compliance status.
What magazines are compatible with GLOCK 43X?
The GLOCK 43X uses its own dedicated single-stack magazines. Factory 10-round flush-fit magazines are the standard. Aftermarket options include the Shield Arms S15 15-round steel magazines (which require swapping the factory magazine catch for a metal one to function reliably). Standard GLOCK 19 or 17 magazines will not fit the 43X grip.
How to clean GLOCK 43X 9mm?
Cleaning your GLOCK 43X is straightforward. First, ensure the pistol is unloaded and remove the magazine. Lock the slide back, push down on the takedown lever, and ease the slide forward off the frame. Remove the recoil spring and barrel. Use a bore brush and solvent to clean the barrel, then wipe down the slide and frame with a CLP-soaked cloth. Lightly oil the barrel hood, slide rails, and locking block. Reassemble in reverse order. I recommend cleaning after every range trip to keep your 43X running reliably.
Grab your GLOCK 43X 9mm 10rd MOS FS BLK today and start shooting with confidence. Over 65% of new concealed carriers choose a slimline GLOCK for their first EDC, and the 43X is the most popular model in that category. Last updated: April 2026
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