Glock G21 Gen4 .45 ACP Full-Size Pistol, 4.61 in Barrel, 13+1, Austrian Marked, With 3 Magazines and Original Case
This Glock G21 Gen4 stands out as a full-size .45 Auto with Gen4 upgrades and excellent condition. It features the dual recoil spring assembly, the Modular Backstrap System, and an enlarged, reversible magazine release. Austrian proof marks and factory rollmarks are present, and the slide, barrel, and frame share matching serial numbers. It comes complete with three 13-round factory magazines, the original case, a magazine loader, and the full Gen4 backstrap set with beavertail options.
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 - Clean, well-defined polygonal rifling.
Specific Condition Notes: The bore is shiny and clean. The pistol shows little to no indication of firing; if fired, the round count appears very low. Overall, surfaces and controls are clean with minimal handling marks.
What’s Included
- Original case
- 3x 13-round Glock factory .45 Auto magazines
- Glock magazine loader
- Glock Gen4 Modular Backstrap Set (with beavertail options)
The G21 Gen4 delivers 13+1 capacity in a standard-frame, duty-size .45 ACP configuration. Its 4.61 in steel barrel is cold hammer forged with polygonal rifling, designed for durability and consistent performance. The slide, barrel, and frame carry matching serial numbers, adding desirable factory consistency.
Gen4 enhancements include the dual recoil spring assembly for controlled cycling and the Modular Backstrap System to tailor grip size. The enlarged, reversible magazine release supports left- or right-handed use without permanent modification.
Factory sights are the fixed polymer Glock pattern with a white-dot front and white-outline rear, offering a 6.77 in sight radius. A Glock Universal accessory rail is integrated into the frame for mounting compatible lights or accessories.
Markings include CIP proof marks and "MADE IN AUSTRIA — GLOCK, INC., SMYRNA, GA." The polymer frame and striker-fired Safe Action system with drop-safe features reflect Glock’s established duty-ready design in .45 Auto.