The Glock G43X MOS Sub-Compact 9mm Luger – 10+1 Capacity, 3.41" GMB Barrel, MOS Cut / Serrated Steel Slide, Polymer Frame with Picatinny Rail, Textured Polymer Grip, Forced Reset Trigger, Ambidextrous Controls (Model PX4350204FRMOSMM, UPC 810100237233) is a feature-packed slimline carry pistol built for shooters who want modern optics capability, enhanced control, and cutting-edge trigger technology in an easy-to-conceal package.
Blending Glock’s legendary reliability with a MOS red-dot ready slide, 10+1 capacity, and a forced reset trigger (FRT) installed in a sub-compact 9mm platform, this G43X MOS configuration delivers fast follow-up shots, excellent ergonomics, and maximum concealability for EDC, off-duty, or range use.
Slimline Sub-Compact 9mm – Easy to Carry, Easy to Shoot
The Glock 43X MOS is part of Glock’s slimline series, designed specifically for concealed carry without sacrificing shootability:
Caliber: 9mm Luger – widely available, effective, and controllable
Capacity: 10+1 rounds in a slim double-stack configuration
Barrel: 3.41" Glock Marksman Barrel (GMB) for improved accuracy and consistency
Sub-compact footprint with a slightly longer grip than the original G43 for better control and faster reloads
This combination makes the G43X MOS one of the best-balanced EDC pistols for shooters who want full-hand purchase without a bulky slide or frame.
MOS Cut Serrated Steel Slide – Optics-Ready Defensive Pistol
The steel slide on this G43X MOS is cut from the factory to accept micro red-dot optics using Glock’s Modular Optic System (MOS) platform:
MOS cut slide lets you mount compatible micro red dots (with appropriate plates/adapters), giving you faster target acquisition and enhanced low-light performance
Front and rear slide serrations make press checks and manipulations easy, even with wet hands or gloves
Durable Glock finish on the slide offers corrosion resistance and a low-profile, non-reflective appearance
Set it up with your favorite carry optic and you’ve got a modern defensive pistol tailored to today’s red-dot-focused training and tactics.
Glock Marksman Barrel (GMB) – Accuracy You Can Trust
The 3.41" Glock Marksman Barrel in this G43X MOS model provides improved precision over legacy Glock barrels:
Enhanced polygonal rifling for excellent gas seal and bullet engagement
Optimized crown for more consistent bullet exit and improved real-world accuracy
Perfect for getting the most out of high-quality defensive and training ammunition
Whether you’re shooting at defensive distances or stretching the pistol out on the range, the GMB helps keep your groups tight.
Forced Reset Trigger – Faster Follow-Up Shots with Positive Reset
This specific configuration of the G43X MOS (PX4350204FRMOSMM) includes a forced reset trigger (FRT), designed to deliver a very positive, tactile, and fast trigger reset:
Short, forceful reset helps you feel exactly when the trigger is ready for the next shot
Can speed up follow-up shots when used correctly, especially under recoil
Maintains a semi-automatic firing cycle—one round fired per trigger press—while emphasizing an aggressive reset feel
As with any trigger system, it’s essential to train thoroughly on this setup, understand how the reset behaves, and ensure you’re compliant with all federal, state, and local regulations regarding trigger configurations and firearm modifications in your area.
Ambidextrous-Friendly Design & Enhanced Ergonomics
This G43X MOS configuration is built to support a wide range of shooters and carry preferences:
Ambidextrous features (such as a reversible magazine catch and slide manipulation-friendly serrations) make it more accommodating for both right- and left-handed users
Textured polymer grip offers a secure hold without being overly abrasive against clothing or skin
Slim frame fits a wide range of hand sizes, making it a great option for concealed carriers, female shooters, and anyone who prefers a thinner grip profile
The result is a pistol that’s comfortable to carry, quick to draw, and easy to control under recoil.
Polymer Frame with Picatinny Rail – Ready for Lights & Accessories
Unlike earlier slimline models, this G43X MOS variant features a frame-mounted accessory rail so you can adapt it to your mission:
Integrated Picatinny-style rail on the dust cover for attaching compact weapon lights or lasers designed for slimline pistols
Maintains Glock’s proven polymer frame durability, impervious to sweat, moisture, and daily carry conditions
Perfect for building a night-capable EDC package with both a red-dot optic and a mini weapon light
For appendix, strong-side, or deep-concealment carry, this rail makes it easier to configure the gun for 24/7 defensive use.
Ideal for EDC, Off-Duty, and Range Training
With its combination of slim dimensions, 10+1 capacity, MOS slide, forced reset trigger, and rail, this Glock G43X MOS setup is excellent for:
Everyday Concealed Carry (EDC) – Slim, lightweight, and built to disappear under a T-shirt or light cover garment
Off-duty law enforcement or professional users – Optics-ready, rail-equipped, and compatible with modern defensive accessories
Range training & skill development – FRT and MOS configuration encourage high-level training with red dots and faster shot strings
Add a quality holster, defensive ammunition, and a consistent practice routine, and this G43X MOS can serve as a primary carry pistol or a backup to a full-size duty gun.
Key Specifications – Glock G43X MOS 9mm PX4350204FRMOSMM
Manufacturer: Glock
Model: G43X MOS
SKU / MPN: PX4350204FRMOSMM
UPC: 810100237233
Caliber: 9mm Luger
Action: Semi-automatic, striker-fired
Capacity: 10+1 rounds
Barrel: 3.41" Glock Marksman Barrel (GMB)
Slide: MOS cut, serrated steel slide
Frame: Slimline polymer frame with Picatinny-style accessory rail
Grip: Textured polymer grip
Trigger: Forced reset trigger (FRT), designed for aggressive, positive reset
Controls: Ambidextrous/reversible-friendly configuration (mag catch and slide manipulation)
Use Case: Concealed carry, home defense, off-duty, training
(Always confirm final specifications and local legal compliance with your dealer or relevant authorities, especially when it comes to trigger systems and firearm configurations.)
Why Choose the Glock G43X MOS PX4350204FRMOSMM?
Choose the Glock G43X MOS Sub-Compact 9mm Luger 10+1 3.41" GMB Barrel, MOS Cut/Serrated Steel Slide, Polymer Frame w/Picatinny Rail, Textured Polymer Grip, Forced Reset Trigger, Ambidextrous (PX4350204FRMOSMM) if you:
Want a slim, easy-to-conceal 9mm with full-hand grip and 10+1 capacity
Prefer an optics-ready MOS slide for mounting a micro red-dot
Need a Picatinny rail for running a compact weapon light or laser
Are interested in a forced reset trigger that emphasizes a strong, positive reset for fast follow-up shots
Appreciate Glock’s proven reliability, parts availability, and accessory ecosystem
From daily concealed carry to focused range work with a red-dot and enhanced trigger system, this Glock G43X MOS PX4350204FRMOSMM is built to offer modern performance in a slimline package you’ll actually want to carry every day.
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