Glock G21 Gen5 MOS .45 ACP, 4.61 in GMB Barrel, nDLC Finish, 13+1 Capacity, 3 Magazines, Austrian-Marked, Matching Serials
This Glock G21 Gen5 MOS stands out with its .45 ACP chambering, Glock Marksman Barrel with polygonal rifling and target-style crown, and durable nDLC finish. It features an MOS slide cut, fixed white-outline sights, and Gen5 updates including an ambidextrous slide stop and subtly flared magwell. Austrian markings and matching serial numbers on the barrel, slide, and frame add clear provenance. It comes complete with three 13-round magazines and key factory accessories.
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 - Pronounced polygonal profile.
Specific Condition Notes: This pistol shows minimal wear from prior handling and use.
What’s Included
- Glock factory hard case
- 3x 13-round factory Glock .45 Auto magazines with orange followers
- Glock Modular Backstrap System backstraps
- Glock instruction manual
- Glock factory magazine loader (5173-1)
- Glock MOS optic mounting plate #06
Built on the full-size G21 frame, this Gen5 MOS variant delivers 13+1 capacity in .45 ACP with Glock's Safe Action system and a left-side magazine release as configured. The Gen5 ambidextrous slide stop and subtly flared magwell support confident handling and reloads.
The 4.61 in steel Glock Marksman Barrel uses polygonal rifling and a target-style crown, finished in nDLC. The bore is clean and bright, aligning with the excellent bore condition noted.
The slide wears an nDLC finish with front and rear serrations and an MOS optic cut. Fixed sights include a white-dot front and a white U-outline rear (6.5 height). The polymer frame incorporates an integral accessory rail on the dust cover.
Proofs and markings include the AT proof mark and inspection symbols on the barrel hood, plus an Austrian-marked slide stamped "AUSTRIA." The barrel, slide, and frame carry matching serial numbers. Manufacturer part number is PA215S203MOS and country of origin is Austria.