Glock G21 Gen5 MOS .45 ACP Full-Size Pistol — nDLC Finish, GMB 4.61 in Barrel, 10+1, Three 10-Round Magazines
This Glock G21 Gen5 MOS stands out as a full-size .45 ACP with the Gen5 feature set and MOS slide introduced for the G21 line in 2023. It combines a Glock Marksman Barrel with an nDLC finish, ambidextrous controls, and front and rear slide serrations. Austrian proof marks, matching serial numbers on the barrel, slide, and frame, and an included MOS adapter plate #7 add collectible and practical appeal.
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 shows mild wear from handling and light use.
What’s Included
- Glock factory hard case
- 3 Glock factory 10-round .45 Auto polymer magazines
- Glock Modular Backstrap System inserts (2)
- Glock MOS adapter plate #7 (part 47535)
The Gen5 configuration brings practical upgrades: an ambidextrous slide stop lever, a reversible magazine release, a flared magwell, and Gen5 grip texture with no finger grooves. The frame is polymer and includes the Glock Universal accessory rail with one cross-slot for compatible lights or accessories.
The 4.61 in steel Glock Marksman Barrel features an nDLC finish, and the slide also wears Glock’s nDLC treatment. Front and rear cocking serrations aid manipulation, and the slide has the factory MOS optic cut with the MOS cover plate installed.
Fixed polymer sights are installed from the factory, with a white dot front. The pistol is chambered in .45 ACP with a 10+1 capacity and ships with three 10-round Glock magazines.
Origin and markings include Austrian proof marks on the barrel, an AT box mark on the barrel hood, and a frame marked "MADE IN AUSTRIA GLOCK, INC., SMYRNA, GA." The barrel, slide, and frame bear matching serial numbers. The Gen5 G21 MOS variant was introduced in 2023.