Glock Pistols
Glock G21
Specs, variants & prices
Glock currently makes one version of the G21 pistol, chambered in .45 Auto. It has a 117" barrel. It takes a red dot on GLOCK's MOS adapter plates.
What versions of the Glock G21 are there?
1 current version. Specs and measurements are Glock's own.
G21 V MOS
—- Optics
- MOS plates
- Caliber
- .45 Auto
- Capacity
- 13
- Barrel
- 117 mm I 4.61"
- Overall length
- 205 mm I 8.07"
- Weight
- 825 g I 29.10 oz (with empty magazine)
What calibers does the G21 come in?
It's chambered in .45 Auto.
Is the G21 optics-ready?
It takes a red dot on GLOCK's MOS adapter plates.
How much does a Glock G21 cost?
Glock doesn't publish suggested retail prices, so the best guide is what stores are charging.
Can you buy one in California or Massachusetts?
California and Massachusetts each keep their own list of handguns approved for sale, and a gun has to be on it before a dealer there can sell it to you. State rules change, so check our California and Massachusetts pages before you buy.
What's the latest on the G21?
Nothing new on the G21 lately.
Specs from Glock, checked October 17, 2026 (source). Spot a mistake? Let us know and we'll fix it. Glock is a trademark of its owner, listed for identification only. Firearms Almanac isn't affiliated with Glock.