Glock 19M Gen5 MOS 9mm Luger – FBI-Spec Compact, Factory Rebuilt, Optics-Ready
The Glock 19M Gen5 MOS is the contract-driven variant developed for the FBI and other agencies, now offered here in excellent factory-rebuilt condition. This compact 9 mm combines the latest Gen5 upgrades—Glock Marksman Barrel, ambidextrous slide-stop levers, and flared mag-well—with an MOS slide cut for direct optic mounting. Matching serial numbers on the slide, barrel, and frame confirm its factory rebuild integrity, making this a scarce and highly collectible example.
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: This pistol was rebuilt at the Glock factory and shows virtually no evidence of firing or handling since the rebuild.
What’s Included
- Glock factory clamshell case
- 3× 15-round Glock Gen 5 magazines with orange followers
- Glock polymer magazine loader
- Two interchangeable backstraps
- Glock MOS adapter plate “02”
- Glock “Important Safeguards” owner’s manual
The 19M lineage is rooted in the FBI’s requirement for a duty pistol with upgraded ergonomics, enhanced accuracy, and improved corrosion resistance. Glock answered with the Marksman Barrel featuring polygonal rifling and an enhanced crown, delivering tighter groups and longer service life.
This Gen5 MOS slide carries the durable nDLC matte black finish and arrives cut for Glock’s Modular Optic System, letting you mount popular red-dot footprints with the supplied adapter plate. Steel Ameriglo sights—red fiber-optic front and black serrated rear—offer a bright, fast sight picture even if you run the gun without an optic.
The frame showcases Gen5’s flared mag-well and an interchangeable back-strap system, giving shooters faster reloads and a customizable grip profile. Ambidextrous slide-stop levers accommodate right- or left-handed operation, and the molded accessory rail supports lights or lasers for duty or defensive roles.
A matched serial-number rebuild direct from Glock’s factory adds confidence in parts fitment and reliability. Because the 19M was never catalogued for commercial sale, examples like this remain scarce—especially in such clean, agency-refreshed condition.