Glock G21 Gen4 .45 ACP Semi-Automatic Pistol – 4.61" Barrel, 10-Round, Matte Black
The Glock G21 Gen4 delivers full-size .45 ACP power in a modern, duty-ready package. This example stands out with its modular backstrap system, dual-recoil spring assembly, and matching serial numbers on the slide, barrel, and frame. Designed and produced in Smyrna, Georgia, it combines Glock’s proven reliability with Gen4 ergonomics and a reversible magazine release that adapts to either hand.
Condition
Overall Condition: Excellent – showing only faint signs of any prior use or handling.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Bore Rifling: Excellent – sharp lands and grooves.
Specific Condition Notes: The pistol is in solid shape with a few light scratches and blemishes that do not affect function; the bore remains clean and shiny.
What’s Included
- Glock factory polymer pistol case
- Glock Gen4 interchangeable backstrap
- Three 10-round factory Glock polymer magazines
This Gen4 G21 features Glock’s octagonal polygonal rifling, offering excellent gas seal and reduced fouling in the 4.61-inch carbon-steel barrel. The dual-recoil spring assembly helps tame .45 ACP recoil, extends service life, and enhances cycling reliability.
The matte-black slide carries rear serrations for positive manipulation and is paired with Glock’s polymer white-dot front and drift-adjustable white-outline rear sights for a familiar, fast sight picture.
A glass-fiber-reinforced polymer frame keeps weight manageable while providing an integral accessory rail for lights or lasers. The reversible magazine release allows quick configuration for left- or right-handed shooters, and the modular backstrap system lets you fine-tune grip size to fit your hand.
Every major component—slide, barrel, and frame—bears matching serial numbers, underscoring this pistol’s original factory integrity. A “B” proof mark confirms inspection to Glock’s stringent standards.