Glock G21 Gen4 .45 ACP, USA-Marked, 4.61 in Barrel, 13+1, Fixed Sights, 3 Mags, Factory Case
This Glock G21 Gen4 is a full-size .45 ACP built in the USA and marked "MADE IN USA GLOCK, INC., SMYRNA, GA." It features a 4.61 inch barrel, 13+1 capacity, fixed dot-and-U polymer sights, and the Gen4 Modular Backstrap System with textured finger grooves. It comes in excellent condition with three 13-round factory magazines, the Glock hard case, and a Stormtrooper white guide rod installed.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
This example is the Gen4 configuration.
What's Included
- Glock factory hard case
- Three 13-round Glock factory magazines for .45 Auto
- Stormtrooper white guide rod (installed)
- Pins and slide stop lever installed
- Glock Gen4 Modular Backstrap set with installation pin (loose)
- Glock polymer magazine speedloader
The G21 Gen4 delivers the classic large-frame Glock .45 ACP package with a 4.61 inch steel barrel, matte black slide, and a black polymer frame. It is a striker-fired, short-recoil, locked-breech design with Glock's Safe Action system.
Gen4 ergonomics include textured finger grooves and the Modular Backstrap System to tailor grip size. The left-side rectangular magazine release is standard for this generation. Sighting is straightforward with fixed polymer dot-and-U sights.
This pistol is USA-marked production with frame stamp "MADE IN USA GLOCK, INC., SMYRNA, GA," and carries "USA" and "US" markings. The overall finish is matte black, providing a uniform, duty-style appearance.
Capacity is 13+1, and this example includes three factory 13-round .45 Auto magazines. The frame integrates an accessory rail. It also shares the magazine pattern with the Glock 41, adding cross-compatibility within the large-frame .45 lineup.