Glock 21 for sale
(15)
Glock 21SF Gen 3 .45 ACP Pistol, Black - PF2150201
Brand:
Glock
Action:
Double Action
Barrel Length:
4.61
Caliber:
.45 ACP
Capacity:
10+1
Finish Per Color:
Black
(2)
Glock G21SF .45 ACP Short Frame Pistol, Black - PF21502
Brand:
Glock
Action:
Double Action
Barrel Length:
4.6in
Caliber:
.45 ACP
Capacity:
13+1
Finish Per Color:
Black
(7)
GLOCK 21
Brand:
Glock
Action:
Double Action
Barrel Length:
4.61in
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(0)
Glock21 Gen5 .45 ACP 13+1 4.6" Gray MOS - 13+1 Rounds, 4.61" Barrel, Gray, Glock Fixed Rear Sights
Brand:
Glock
Action:
Safe Action
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13+1
Finish Per Color:
Grey
(0)
GLOCK 21 GEN5 MOS 45ACP 4.61" 10RD BLACK
Brand:
Glock
Action:
Pistol
Barrel Length:
4.6in
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(0)
Glock 21SF .45ACP 4.6-inch Barrel 13rd Glock Rail
Brand:
Glock
Action:
Pistol
Barrel Length:
4.61
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(0)
Glock 21 C 21C .45 ACP Compensated Fixed Sights - 10+1 Rounds, 4.60" Barrel, Polymer Grips, Blue/Black, 3-Dot Sights
Brand:
Glock
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
10+1
(0)
Glock 21SF .45 ACP 4.6" Barrel 13-Rounds Rebuilt
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
Marketplace Insights
★ 4.6/5
based on 24 customer reviews across 9 variants from 27 retailers
Glock 21 delivers exceptional reliability, accuracy, and low recoil in .45 ACP with excellent ergonomics, though some customers experienced magazine capacity confusion at retailers.
What customers like
Reliability & Durability54%
I have put about 150 rounds through it, factory and reloads. Not a single failure
Accuracy & Performance46%
For a big 45 caliber gun the Glock 21 is dead on accurate.
Comfortable Ergonomics42%
The Short Frame fits me much better than the standard 21.
Low Recoil for Caliber25%
Virtually no muzzle flap and very little recoil makes this an ideal duty weapon!
High Capacity Magazines21%
It is nice that it can hold 13 + 1 round.
Common concerns
Magazine Capacity Confusion13%
I was certain that I ordered the model with 13 round magazines and received 10 round mags
Retailer Service Issues8%
Not happy with Bass Pro on this sale, they get 1 star.
Frequently Asked Questions
Glock 21 for sale
Is a Glock 21 a 45 caliber?
Yes, the Glock 21 is chambered in .45 ACP. It is a full-size semi-automatic pistol with a 13-round magazine capacity. It is popular among law enforcement and civilians for self-defense, and the line has evolved through multiple generations, including Gen 4, Gen 5, and Gen 5 MOS variants.
Is Glock 21 better than Glock 19?
Neither is objectively better—it depends on your priorities. The G21 fires .45 ACP with 13 rounds; the G19 fires 9mm with 15 rounds. The G21 offers more stopping power per shot; the G19 provides higher capacity and less recoil. Choose based on hand size, shooting style, and intended use.
Which Glock 21 is the best?
"Best" depends on your needs. Gen 5 MOS suits those wanting optics capability and modern ergonomics. Gen 4 balances features and cost. Gen 3 SF works for those preferring a simpler design. All are reliable .45 ACP pistols. Prices vary across variants, with a median around $569.
Is the Glock 21 Gen 5 a good gun?
Whether it's "good" depends on your priorities. The current Gen 5 offering is the Glock 21 Gen5 MOS, an optics-ready variant delivering reliability, ergonomics, and .45 ACP stopping power. The full-size frame suits larger hands. If you prefer lighter recoil or higher capacity, a 9mm Glock might suit you better. Typically priced around $569.
Is the Glock 21 Gen 5 discontinued?
Yes, the Glock 21 Gen 5 has been discontinued. Glock confirmed plans to discontinue a large portion of popular pistols after November 30, 2025, replacing them with a new V series. The G21 Gen 5 MOS .45ACP appears on discontinued product lists. Check our marketplace for remaining available inventory.
How much does a G21 cost?
G21 pistols typically cost around $569, with most variants ranging from $528 to $676. Nine models are available across 27 retailers, including Gen 5 MOS, Gen 4, and Gen 3 SF versions.
What is a Glock 21C?
Glock 21C is a full-size .45 ACP striker-fired pistol. The "C" denotes a compensated design, featuring a ported barrel that vents gases to reduce muzzle rise and recoil. It holds 13 rounds and is used by law enforcement and civilian shooters.
What holsters will a Glock 21 fit in?
The Glock 21 fits holsters specifically molded for it, available in IWB, OWB, appendix, and chest carry styles from makers like Alien Gear and Blade-Tech. Verify compatibility with your specific generation (Gen 3 SF, Gen 4, Gen 5), as dimensions vary slightly. Many holsters also accommodate weapon lights and optics.