Description
The Glock 43X MOS takes the most-carried Slimline in the lineup and adds the two things concealed carriers keep asking for: a factory optic cut and a light rail. Glock builds this variant, part number PX4350203FRMOS, with a milled MOS slide, front slide serrations, a slim accessory rail molded into the dust cover, and two magazines – so a micro red dot and a weapon light both bolt on without a single trip to a machinist.
Why the Glock 43X MOS Carries So Well
The Slimline frame measures just 1.10 inches at its widest point and the pistol weighs 16.4 ounces empty, which is why the 43X pattern disappears under a t-shirt in ways a double-stack never will. What separates this model from the plain 43X is capability. You keep the same 6.5-inch overall length and 3.41-inch Marksman barrel, and you gain a slide already cut for a micro optic plus a frame that already has somewhere to hang a light.
Optic-Ready MOS Slide
The Modular Optic System cut accepts common micro red dot footprints through Glock’s adapter plate system, so a Holosun, Trijicon RMRcc or Shield-pattern sight mounts at the correct height and indexes off the slide rather than a dovetail insert. Factory white dot front and white outline rear sights stay in place as backup irons. The front serrations give a positive purchase for press checks, which matters a great deal more once an optic occupies the rear of the slide.
Slim Frame With a Front Accessory Rail
The molded GLOCK Slim Mounting Rail is the reason many shooters pick this version over the standard gun. It takes a compact weapon light without adding meaningful bulk to the holster line. Behind it sits a built-in beavertail, a short trigger distance, a reversible magazine catch for left-handed carry, and grip texture that is aggressive without being abrasive against bare skin.
Marksman Barrel and Safe Action Trigger
The Glock Marksman Barrel uses enhanced polygonal rifling with a 1-in-9.84 twist, and it is the single biggest accuracy improvement Glock has made to the Slimline guns. The Safe Action system breaks at roughly 5.5 pounds with the trigger safety, firing pin safety and drop safety all working together. Gas nitride treatment on the slide and barrel shrugs off sweat and holster wear season after season.
Specifications
- Manufacturer and model: Glock 43X MOS, part PX4350203FRMOS
- Caliber: 9mm Luger
- Action: Safe Action striker-fired semi-automatic
- Capacity: 15+1 with two magazines included
- Barrel: 3.41 in. Glock Marksman Barrel, 1-in-9.84 twist
- Overall length: 6.5 in.
- Width: 1.10 in.
- Weight: 16.4 oz. unloaded
- Slide: matte black gas nitride, MOS optic cut, front serrations
- Frame: black polymer Slimline with GLOCK Slim Mounting Rail
- Sights: white dot front, white outline rear
- Trigger pull: approximately 5.5 lb.
- In the box: two magazines, cleaning rod and brush, cable lock, hard case
- UPC: 764503073441
Who Should Buy It
If you are building one carry pistol to do everything, the Glock 43X MOS is the easiest recommendation on the shelf. It rides comfortably in an appendix holster all day, it accepts the optic and light you already own, and it feeds from magazines that are cheap and everywhere. New permit holders get a soft-shooting 9mm with a grip long enough for a full firing hand instead of a curled pinky. Experienced shooters get a legitimate backup to a duty gun that runs the same manual of arms.
The only real knock is that a 3.41-inch barrel gives up velocity to a full-size gun, and slim magazines wear out faster than double-stacks under heavy range use – buy a spare or two. Every firearm we sell ships to a licensed FFL dealer and is inspected before it leaves our counter. Browse the rest of our firearms catalog or check factory details for the Glock 43X MOS at Glock. Call us with questions about optic plates, holsters or transfer paperwork.
Reviews
There are no reviews yet.