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Glock 21 .45 Auto

glock 21 dimensions diagram

The Glock 21 packs a classic .45 ACP punch that you won’t soon forget. A mild recoil despite its size will make you thank yourself while rolling through its standard 13 round magazine capacity. This full-sized duty pistol weighs less than a steel 1911 thanks to its polymer frame; as the Gen 4 is being produced, this smooth-firing and accurate duty-sized pistol has only gotten better.

The featured Picatinny rail offers boundless customization options for sights, lasers, and lights; the modular frame allows for grip customization to fit any hand size. A reversible magazine catch is an additional feature so that left and right-handed shooters alike can enjoy this firearm with optimal comfort.

Maximum Home Defense

The man-stopping .45 ACP cartridge is a great option for home defense, and in the Glock 21 you can be sure that you can eliminate a threat quickly and accurately. Some claim this piece is the smoothest .45 caliber weapon they’ve ever fired, which means less fatigue with follow-up shots if that need were to ever rear its ugly head.

Glock 21 Standard Features

  • Safe Action® System
  • Modular Backstrap
  • Octagonal Barrel Rifling
  • An impressive factory-standard 13-round magazine
  • Semi-automatic
  • Glock MH3 steel three-dot night sights
  • Picatinny rail compatibility
  • Dual recoil spring assembly

Glock 21 Models and Variations

Generation 4 model Glock 21’s are reliable, accurate, and customizable for just about anyone. Currently, generation 4 is the only model in production, the Glock 21 was originally introduced as a Generation 2, has been through Generation 3, and has yet to be released with a Generation 5 revamp. The same glock quality shines through each round of improvements regardless.

Current Models In Production Discontinued Models
  • Gen 4
  • Gen 4 Black nitride
  • Gen 4 FDE cerakote
  • Gen 4 FDE
  • Gen 4 Black
  • Gen 4 OD Green
  • Gen 4 Gray
  • Gen 4 Gray Cerakote
  • Gen 4 SF
  • Gen 3 Black
  • Gen 3 FDE
  • Gen 3 OD Green
  • Gen 3 SF
  • Gen 4 Lipsey’s Exclusive FDE
  • Gen 4 Plum
  • Gen 4 Spartan Bronze
  • Gen 4 Tiffany Blue
  • Gen 4 Tiffany Pink

Price:$500-$1,000

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Glock 21 Gen4

glock 21 gen4

As the most recent release of the Glock 21, the generation 4 model is the most reliable, most comfortable, and most resilient model yet. A great choice for home defense or open carry, this .45 ACP will add extra peace of mind knowing you’ll be able to hit what you need to quickly, accurately, and repeatedly. This is also the most available variant on the market, as previous generations are no longer in active production.

Glock 21 Gen 4 Specs:

Attribute Spec
Caliber: .45 ACP
Magazine Capacity: 13 + 1 / 10 + 1
Weight (with unloaded magazine): 29.28 oz
Weight (with fully loaded magazine): 38.80 oz
Trigger Pull: 28N
Barrel Length: 4.61”
Slide Length: 7.60”
Overall Length: 8.07”
Slide Width: 1.12”
Overall Width: 1.34”
Height (including magazine): 5.51”
Trigger distance (backstrap to trigger face): 2.85”
Sights: Fixed

Popular variations:

Browse: Glock 21 G4 pistols

Glock 21SF Gen4

glock 21sf gen4

The Glock 21SF (short frame) model of the Glock 21 is designed with smaller hands in mind, while retaining all the modular features of the Glock 21. The receiver circumference has been reduced to fit smaller hands more comfortably and ergonomically, without compromising capacity, balance, recoil absorption, or opportunities to add accessories.

Glock 21SF Gen 4 Specs:

Attribute Spec
Caliber: .45 ACP
Magazine Capacity: 13 + 1 / 10 + 1
Weight (with unloaded magazine): 29.10 oz
Weight (with fully loaded magazine): 38.80 oz
Trigger Pull: 28N
Barrel Length: 4.61”
Slide Length: 7.60”
Overall Length: 8.07”
Slide Width: 1.12”
Overall Width: 1.34”
Height (including magazine): 5.51”
Trigger distance (backstrap to trigger face): 2.85”
Sights: Fixed

Popular variations:

Browse: Glock 21SF Gen4 pistols

Glock 21 Gen 4 OD Green

This limited edition color run gives the classic Glock 21 look a little extra character. The Glock 21 doesn’t waver in quality when producing various colored frames, and even more unique colors are available depending on the gun broker. Commonly produced colors for the Glock 21 Gen 4 include black, FDE, OD Green, and Gray, though you can find some in pink, plum, blue, and a super unique burnt bronze color.

Glock 21 Gen 4 OD Green Specs:

Attribute Spec
Caliber: .45 ACP
Magazine Capacity: 13 + 1 / 10 + 1
Weight (with unloaded magazine): 29.28 oz
Weight (with fully loaded magazine): 38.80 oz
Trigger Pull: 28N
Barrel Length: 4.61”
Slide Length: 7.60”
Overall Length: 8.07”
Slide Width: 1.12”
Overall Width: 1.34”
Height (including magazine): 5.51”
Trigger distance (backstrap to trigger face): 2.85”
Sights: Fixed

Browse: Glock 21 45 Auto pistols