Glock 21 Gen4 .45 ACP Full-Size Pistol, 4.61 in Barrel, Black, 3x 10-Round Magazines, Austrian-Made
This Glock 21 Gen4 is a full-size .45 Auto with the Gen4 feature set, presented in excellent condition and complete with three factory 10-round magazines and original accessories. It is Austrian-made with factory import markings, and includes the modular backstrap system, dual captive recoil spring assembly, and fixed white-dot/white-outline sights. The bore is clean and mirror-bright.
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 - Polygonal rifling is clean and well-defined.
Specific Condition Notes: Shows minimal evidence of prior use. The bore is bright with a mirror finish.
What’s Included
- Glock factory clamshell hard case
- Original Glock manual
- Glock Gen4 Modular Backstrap System inserts (not installed)
- Glock magazine loader
- Three factory Glock .45 Auto 10-round magazines
The Gen4 configuration brings practical upgrades to this large-frame .45 Auto, including RTF texturing with finger grooves, an enlarged reversible magazine release, and the dual captive recoil spring assembly. The modular backstrap system is included to tailor the grip to hand size and preference.
Dimensions and capacity are well-suited to a full-size duty profile: a 4.61 in barrel, 8.07 in overall length, and an unloaded weight of approximately 29.28 oz with magazine. It ships with three factory 10-round magazines for a stated capacity of 10+1.
Construction details include a steel barrel with polygonal, 8-groove rifling and an approximate 400 mm twist. The pistol uses a short-recoil, locked-breech, striker-fired action with the Glock Safe Action system and its three passive safeties. The glass-fiber–reinforced polymer frame features the Glock Universal accessory rail on the dust cover.
The matte black slide has rear serrations for confident manipulation, and the fixed sights consist of a white-dot front and white-outline rear. Markings include an AT stamp on the barrel hood and "MADE IN AUSTRIA GLOCK, INC., SMYRNA, GA."