Glock 20 Gen 4

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Glock 20 Gen 4 Gun Stats

Glock 20 Gen 4

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The GLOCK 20 Gen4 delivers formidable force downrange with high accuracy over long distance. The use of GLOCK hi-tech polymer considerably reduces felt recoil even in this heavy caliber. For the hunting community this 10 mm Auto is a reliable companion providing a safe and accurate finishing shot, even when hunting big game. The Modular back strap system makes it possible to instantly customize its grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters.

Glock 20 Gen 4 Specs

1 Category

Technical Data


10mm Auto


Safe Action







Barrel Length



8.07 Inches


30.72 oz


5.5 Inches


1.35 Inches

Glock 20 Gen 4 Features

The Glock 20 Gen 4 is chambered for the hard-hitting 10mmAuto cartridge and has a 15-round standard magazine capacity.  Its barrel measures 4.61 inches long and its magazine release is reversible to accommodate both left and right handed users.  The reversible mag release can also make it easier for smaller-handed users to use their middle finger to press the magazine release instead of stretching their thumbs to drop the mag in the traditional way.

Glock 20 Gen 4 Ballistics

10mm Auto Ballistic Data
Range (Yards) Drop (inches) Velocity Energy Wind drift (inches) Time (milliseconds)
0 0 0 0 0 0
50 0 0 0 0 0
100 0 0 0 0 0
150 0 0 0 0 0
200 0 0 0 0 0
250 0 0 0 0 0
300 0 0 0 0 0
350 0 0 0 0 0
400 0 0 0 0 0
450 0 0 0 0 0
500 0 0 0 0 0

Glock 20 Gen 4 Capacity

Shipped with 10 and 15 round double-stack, single-feed magazines, Glock and other magazine manufacturers offer capacities of 18 and 30 rounds.

Glock 20 Gen 4 Ergonomics

The Glock 20 Gen 4 is a full-size 10mmAuto using double-stack magazines, resulting in a grip that may be too large for users with smaller hands.  The serrations on the slide assist in cycling the action, and the magazines always fall freely when pressing the magazine release.  The finger grooves and Glock’s Gen 4 grip texturing give the user an excellent grip to help tame the 10mmAuto.

Glock 20 Gen 4 Fit & Finish

The build quality of the Glock 20 Gen 4 is exactly what you would expect out of any Glock.  The nDLC coating is consistently applied across the slide, and the polymer frame is free of any overpress defects from the injection molding process.

Fit and Finish

Glock 20 Gen 4 Concealability

The Glock 20 Gen 4 measures over 8 inches long and 5.5 inches tall making it difficult for concealed carry without heavy clothing or utilizing a shoulder holster.  The Glock 21 is better suited for open carry or concealed winter carry.

How much is a Glock 20 Gen 4 worth?

In 2023 a new or used Glock 20 Gen 4 value varies depending on supply and demand. In the last 12 months there is great demand for a Glock 20 Gen 4 and most semi-auto pistols. The Price for a Glock 20 Gen 4 has increased in cost by $0.00 in 2023 compared to 2022.

Estimated New and Used Values for a Glock 20 Gen 4 Values are based on a basic model with no options or colors.

Condition Trade-In Private Party Dealer
New In box $400.02 $523.10 $615.41
Excellent $369.25 $492.33 $553.87
Very Good $338.48 $492.33 $553.87
Good $307.71 $461.56 $523.10
Fair $215.39 $400.02 $492.33
Poor $153.85 $307.71 N/A

Gun Value Conditions explained:

New in box - 100% condition in unopened box. Excellent - 95%+ condition with or without box.

Very Good - 90% - 95% condition (all parts/finish should be original).

Good - 80-90% condition (all parts/finish should be original).

Fair - 30% - 80% condition, parts, and finish may or may not be original. Must function properly and shoot.

Poor - under 30% condition. Firearm has severe wear and tear, does not function, or is damaged.

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