Glock G21 Gen4 .45 ACP Full-Size Pistol, Black, 4.61 in Barrel, 10+1
This Glock G21 Gen4 delivers the classic .45 ACP performance in a full-size, striker-fired package with Gen4 upgrades. It features the Gen4 Rough Textured Frame with finger grooves, an enlarged reversible magazine release, fixed polymer sights, and a 4.61 inch barrel with polygonal rifling. Austrian manufacture with factory markings and a proof symbol on the barrel hood, plus matching serial numbers on the slide, barrel, and frame insert, add desirable authenticity. Configured 10+1 with the included 10-round magazine.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Polygonal rifling - clean, strong polygonal profile with minor wear.
Specific Condition Notes: There are signs of holster wear. There is finish loss on the slide near the barrel/muzzle area.
What’s Included
- 1x 10-round factory Glock .45 Auto double-stack magazine marked "GLOCK AUSTRIA"
The Gen4 system brings practical enhancements to this G21, including an enlarged, reversible magazine release and the Gen4 Rough Textured Frame (RTF) with finger grooves for confident handling. The frame is set up for Glock’s Modular Backstrap System (MBS), allowing grip size adjustment when backstraps are used.
Its 4.61 inch barrel uses Glock’s polygonal rifling for efficient gas seal and easy maintenance, paired with the Gen4 dual captive recoil spring assembly designed for the Gen4 series. The Safe Action system delivers consistent striker-fired operation.
Sight picture is straightforward and fast with fixed polymer sights: a white-dot front and white-outline U-notch rear. Rear slide serrations aid manipulation, and the Glock accessory rail integral to the dustcover supports compatible lights or accessories.
Markings include "MADE IN AUSTRIA GLOCK, INC., SMYRNA, GA." and a proof symbol on the barrel hood. The slide, barrel, and frame insert share matching serial numbers. Finish is black on both slide and frame.
This pistol is configured for a 10+1 capacity with the included 10-round magazine, aligning with jurisdictions that require reduced-capacity magazines while maintaining the G21’s .45 ACP capability.