Glock G21 Gen4 .45 ACP Full-Size, USA-Marked, 3x 13-Round Mags, Excellent Condition
This Glock G21 Gen4 is a full-size .45 ACP pistol made in the USA, featuring matching USA slide, barrel, and frame markings. It is in excellent condition with a clean, mirror-bright bore and comes complete with three 13-round factory magazines, the Gen4 modular backstrap set, and the original Glock hard case.
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 - Strong, well-defined polygonal profile.
Specific Condition Details: Exhibits minimal evidence of prior handling. The firearm presents cleanly throughout, and the bore is bright and shiny.
What’s Included
- Glock factory hard case
- 3 Glock factory 13-round polymer double-stack magazines
- Glock Gen4 modular backstrap set
- Speed loader
- Manual
- Cleaning tools
The G21 Gen4 delivers 13+1 rounds of .45 ACP in a full-size package with Glock's Gen4 upgrades. It uses a 4.61 in hammer-forged steel barrel with polygonal rifling and a 1:15.75 RH twist, paired with the Gen4 dual recoil spring assembly.
Ergonomics are enhanced with the Gen4 RTF grip texture and finger grooves, plus a modular backstrap system to adjust trigger reach. The enlarged, reversible magazine release supports left- or right-handed use. The Safe Action system employs three internal safeties.
Sighting is straightforward with fixed polymer sights: a white-dot front and white-outline U-notch rear, set on a 6.77 in sight radius. The slide has rear-only serrations, and the pistol features a black slide and black polymer frame with an integral accessory rail.
Markings and origin are clearly defined: US proof/cartouche marks on the barrel hood, USA marking on the slide, and MADE IN USA GLOCK, INC., SMYRNA, GA on the frame. Dimensions are 8.07 in overall length, 5.51 in height, and 1.34 in width, with a slide length of 7.60 in. Weight is 26.28 oz without a magazine, 29.28 oz with an empty magazine, and approximately 38.80 oz loaded.