GLOCK UX4350203FRMOS G43X MOS 9MM LUGER 15+1 3.41" BBL

The Glock G43X MOS (UX4350203FRMOS) is a subcompact 9mm Luger semi-automatic pistol built on the slender Slimline frame with a factory optics-ready slide and a 15+1 capacity configuration using Shield Arms S15 steel magazines, delivering full-size round count in a concealment-friendly package. This 9mm optics-ready concealed carry pistol is purpose-built for everyday carry shooters, duty backup use, and anyone who wants maximum capacity in a slim, compact platform that accepts micro red dot optics without modification.

Key Features

• Manufacturer part number: UX4350203FRMOS
• Caliber: 9mm Luger (9x19mm)
• Action type: Semi-automatic, Glock Safe Action
• Barrel length: 3.41 inches, match-grade Glock Marksman Barrel (GMB)
• Barrel finish: nDLC
• Overall length: 6.50 inches
• Height with magazine: 5.04 inches
• Width overall: 1.10 inches
• Slide width: 0.87 inches
• Frame material: Polymer
• Slide material: Steel, nDLC finish
• Capacity: 15+1 rounds with included Shield Arms S15 steel magazines
• Weight without magazine: 16.26 oz
• Weight with loaded magazine: 22.96 oz
• Trigger pull: Approximately 5.4 lbs
• Trigger distance: 2.64 inches
• Sights: White dot front, white outline rear
• Rail: Glock Slim Mounting Rail
• Optic system: MOS slide cut for micro red dot optics, no adapter plates required or included

Special Features

• The MOS slide cut on the G43X is precision-machined directly for compact micro optics including the Shield RMSc, Holosun 507K, SIG Romeo Zero, and SwampFox Sentinel, allowing direct mounting without the adapter plate system used on larger Glock MOS models
• The match-grade Glock Marksman Barrel features a recessed, target-crowned muzzle and improved rifling geometry carried over from the Gen5 series, producing tighter shot groups compared to earlier Glock barrel designs at equivalent distances
• Shield Arms S15 steel magazines bring capacity from the standard 10-round OEM baseline to 15 rounds while maintaining a flush-fit profile identical in length and external dimension to factory Glock magazines, adding no grip length or width to the pistol
• The built-in beavertail on the polymer frame positions the shooting hand higher on the grip, placing the bore axis lower in the hand for a more controlled firing grip and a more natural presentation from the holster
• Precision-milled front slide serrations add a forward grip surface for press check technique and one-hand manipulation without requiring aftermarket machining
• The reversible magazine catch accommodates left-handed and right-handed shooters without replacing any components, keeping the controls fully functional regardless of dominant hand

Practical Benefits

• The 1.10-inch overall width and 6.50-inch overall length keep the G43X MOS printable under a wide range of cover garments and concealable in IWB, AIWB, and OWB holster configurations that fit the existing Glock 43X footprint
• Fifteen rounds of 9mm in a flush-fit magazine gives you the same on-board capacity as a full-size Glock 19 in a frame that is meaningfully slimmer and shorter, reducing the bulk trade-off that typically comes with high-capacity carry pistols
• The Glock Slim Mounting Rail accepts compact weapon-mounted lights designed for slim-frame Glock pistols, giving you the option to add a light to your carry or home defense configuration without replacing the frame
• The nDLC finish on both the barrel and slide resists corrosion, abrasion, and sweat exposure during extended carry, keeping the pistol serviceable through daily use without frequent refinishing or treatment
• Compatible with the wide Glock 43X holster, magazine, and accessory ecosystem, this pistol drops into any holster cut for the 43X MOS and accepts the full range of Shield Arms and aftermarket magazines already in circulation
• If you carry daily and want a slim 9mm that delivers full-size capacity through a flush-fit steel magazine, accepts a micro red dot straight from the factory, and fits in the same holster footprint as a standard 43X, the Glock G43X MOS (UX4350203FRMOS) gives your carry setup a smart addition that covers all three priorities without compromise

The Glock G43X MOS (UX4350203FRMOS) in 9mm is a capable tool for everyday carry shooters who want a slim, optics-ready subcompact with a 15+1 capacity configuration and proven Glock reliability in a platform built for all-day concealed carry.