Choosing between the Glock 20 and Glock 21 often comes down to personal preference, but understanding the key differences can significantly impact your decision. Both are powerful handguns, but they cater to different needs and shooting styles. This in-depth comparison will help you determine which Glock is the right fit for you.
Caliber: The Core Difference
The most significant difference between the Glock 20 and Glock 21 lies in their caliber:
-
Glock 20: This pistol chambers the potent 10mm Auto cartridge. The 10mm offers substantially more stopping power than the .45 ACP, with flatter-shooting trajectories and less recoil than one might expect given its power. However, ammunition can be more expensive and sometimes harder to find than .45 ACP.
-
Glock 21: This model fires the classic .45 ACP cartridge. The .45 ACP is known for its substantial stopping power at close range, readily available ammunition, and generally lower cost. However, it has more recoil and a slower muzzle velocity than the 10mm.
Table: Glock 20 vs Glock 21 Caliber Comparison
| Feature | Glock 20 (10mm Auto) | Glock 21 (.45 ACP) |
|---|---|---|
| Caliber | 10mm Auto | .45 ACP |
| Stopping Power | Higher | High |
| Recoil | Moderate | Higher |
| Ammunition Cost | Generally Higher | Generally Lower |
| Ammunition Availability | Can be less readily available | Widely available |
| Muzzle Velocity | Higher | Lower |
Size and Weight: A Matter of Feel
While both are full-size handguns, there are subtle differences in dimensions and weight:
-
Glock 20: The Glock 20 is slightly larger and heavier than the Glock 21, largely due to the longer 10mm cartridge. This added size might make it slightly more difficult to conceal for some users.
-
Glock 21: The Glock 21, while still a full-size pistol, is slightly more compact and lighter than the Glock 20. This can make it feel more manageable for some shooters, particularly those with smaller hands.
Table: Glock 20 vs Glock 21 Size and Weight Comparison (Approximate)
| Feature | Glock 20 (10mm Auto) | Glock 21 (.45 ACP) |
|---|---|---|
| Length | ~8 inches | ~7.9 inches |
| Height | ~5.5 inches | ~5.4 inches |
| Width | ~1.3 inches | ~1.3 inches |
| Weight (unloaded) | ~30 ounces | ~29 ounces |
Ergonomics and Handling
Both pistols share Glock's signature robust polymer frame and simple, reliable design. However, individual hand size and grip preference play a significant role in determining which feels better.
-
Glock 20: Some shooters find the added size and weight of the Glock 20 contribute to a more stable shooting platform, particularly during rapid firing.
-
Glock 21: The slightly smaller size and lighter weight of the Glock 21 can be advantageous for shooters with smaller hands or those who prefer a more manageable handgun. The reduced recoil of the .45 ACP might also aid in faster follow-up shots.
Recoil and Accuracy
The difference in caliber significantly impacts recoil and accuracy.
-
Glock 20: While the 10mm has more power, the recoil isn't as harsh as one might assume. The Glock 20’s weight helps manage recoil, leading to surprisingly good accuracy for its caliber.
-
Glock 21: The .45 ACP's heavier recoil can be more challenging for some shooters to manage, potentially impacting accuracy, especially during rapid fire.
Ammunition and Cost
This is a crucial consideration.
-
Glock 20: 10mm ammunition is generally more expensive and sometimes less readily available than .45 ACP. This is a factor to consider, especially for regular practice.
-
Glock 21: .45 ACP ammunition is widely available and relatively inexpensive, making it a more budget-friendly option for range time.
Conclusion: Which Glock is Right for You?
The "better" Glock depends entirely on your needs and priorities.
-
Choose the Glock 20 (10mm) if: You prioritize maximum stopping power, flatter shooting trajectories, and are willing to pay a premium for ammunition. You value a slightly larger and heavier frame.
-
Choose the Glock 21 (.45 ACP) if: You prioritize a more manageable firearm with readily available and affordable ammunition, and recoil is a significant concern. You value a slightly more compact size and reduced weight.
Ultimately, the best way to decide is to handle both pistols and shoot them if possible. This hands-on experience will help you determine which feels best in your hand and meets your specific needs. Consider your intended use (home defense, concealed carry, competition) and your personal shooting style before making your final decision. Remember to always practice safe firearm handling and storage.