Glock 21SF

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Glock 21SF Gun Stats

Glock 21SF

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Remarkable for its accuracy and light recoil, the GLOCK 21SF delivers the legendary stopping power of the .45 AUTO round with 10/13 round magazine capacity. Countless law enforcement units swear by the G21SF pistol, and that's why this powerful, lightweight, all climate workhorse is standard issue from the North to South Poles. The SF model reduces the circumference of the receiver at the rear, or "back strap," offering increased comfort and controlespecially for shooters with smaller hands. This model features a threaded barrel.

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Glock 21SF Specs

1 Brand

2 Category

Technical Data


.45 Auto (.45 ACP)


Safe Action







Barrel Length


Gun Type


Glock 21SF Features

The Glock 21 SF is a Gen3 Glock pistol that is built on a polymer frame and operates on a Browning-inspired short-recoil action with a tilting barrel.  This striker-fired hand cannon includes an accessory rail for mounting lights and lasers if desired, and uses a 4.61 inch barrel which is long enough to have muzzle velocities comparable to that of a 5 inch 1911.  The rear sight is windage adjustable and the grip is modified from the typical Gen3 style.

Glock 21SF Ballistics

.45 Auto (.45 ACP) 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 21SF Capacity

The Glock 21 is chambered in .45ACP and feeds from any full-size double-stack, single-feed Glock magazine designed around the .45ACP cartridge.  The standard magazine capacity for the Glock 21 SF is 13 rounds, however magazines limited to 10 rounds are available to users who live in a state with capacity restrictions.  Glock as well as aftermarket sources make a 25 round extended capacity magazine.

Glock 21SF Ergonomics

The Glock 21 SF has a Short Frame which means the grip circumference has been reduced.  This has many benefits as the smaller grip allows for users with smaller hands to properly hold it and users with larger hands can more fully wrap their fingers around it.  The slide has grip serrations that flank the rear sight, however being a Gen3, your slide may have their “Frying Pan” style Tennifer coating, though half-way through production they would switch to the useful nDLC coating that isn’t so slippery.

Glock 21SF Fit & Finish

The Glock 21 SF is built following Gen3 prints and is built on a high-strength polymer frame that is very resilient against cracking and wear.  The slides and barrels are made of stainless steel and are typically coated with Glock’s Tenifer coating that many refer to as “the frying pan coating”.  Both it and the nDLC coating offer excellent wear resistance and ensure that the slide and barrel are protected against wear and corrosion.

Fit and Finish

Glock 21SF Concealability

Measuring 5.5 inches tall, 1.26 inches wide and 8.07 inches long, the Glock 21 SF is nearly unconcealable.  With an overall size nearly identical to the 1911, the only advantages in concealment are the increased ammo capacity and the lack of an exposed hammer.  The Glock 21 SF is most easily carried in an open-carry setup similar to how police and competition shooters rock their boomsticks.

Glock 21SF Parts & Upgrades

How much is a Glock 21SF worth?

In 2024 a new or used Glock 21SF value varies depending on supply and demand. In the last 12 months there is great demand for a Glock 21SF and most handguns. The Price for a Glock 21SF has increased in cost by $0.00 in 2024 compared to 2023.

Estimated New and Used Values for a Glock 21SF Values are based on a basic model with no options or colors.

Condition Trade-In Private Party Dealer
New In box $339.38 $443.81 $522.13
Excellent $313.28 $417.70 $469.92
Very Good $287.17 $417.70 $469.92
Good $261.07 $391.60 $443.81
Fair $182.75 $339.38 $417.70
Poor $130.53 $261.07 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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