Glock 43X MOS Slimline 9mm Pistol — Custom Overwatch Flat Trigger, Optic-Ready, 15+1 Capacity
The Glock 43X MOS Slimline combines Glock’s proven reliability with a micro-compact footprint and modern Gen 5 upgrades. This 2023 Austrian-made example adds an Overwatch Precision flat-face aluminum trigger for a cleaner break, plus a factory RMSc-footprint optic cut and three 15-round steel magazines that boost capacity without enlarging the grip. A durable black nDLC finish, Glock Marksman Barrel, and Slim accessory rail round out a highly portable, optic-ready defensive platform.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent rifling – Sharp lands and grooves.
Specific Condition Notes: Light handling marks are visible on close inspection but do not affect function or appearance.
What’s Included
- 3× 15-round Check-Mate Industries “Sig Gen3” steel magazines
- 1× 10-round OEM Glock slim polymer magazine
- Carbon-fiber-texture Kydex IWB holster (light-bearing for Streamlight TLR-7 Sub)
Optic-ready slide. The factory-machined MOS cut accepts RMSc-footprint red-dot sights, giving the shooter a direct-mount option without additional milling. Front and rear serrations provide positive purchase for press checks and manipulations, while the black nDLC finish resists corrosion and wear.
Upgraded trigger. An Overwatch Precision flat-face aluminum trigger replaces the stock unit, offering a straighter press, reduced pre-travel, and a tactile reset that many shooters find easier to control during rapid strings.
Enhanced barrel and capacity. The 3.41-inch Glock Marksman Barrel features improved polygonal rifling for consistent accuracy. Paired with aftermarket steel magazines, the pistol holds 15+1 rounds—nearly doubling the OEM capacity without altering the slim grip profile.
Gen 5 ergonomics. A molded Slim accessory rail, reversible magazine catch, and Safe Action system mirror the latest full-size Glocks, while aggressive Gen 5 stippling delivers secure purchase in all conditions.
Austrian 2023 production. The “CE” serial prefix identifies recent Austrian manufacture, assuring buyers of current-generation quality control and parts compatibility.