Glock 21 for sale
(0)
Glock UV2150203MOS G21 V MOS Full Size 45 ACP 13+1 4.61" Black GMB Barrel, Black nDLC Steel Optic Ready/Serrated Slide, Black Polymer Frame w/Accessory Rail, Textured Polymer Grip, Ambidextrous
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(0)
Glock UV2150201MOS G21 V MOS Full Size 45 ACP 10+1 4.61" Black GMB Barrel, Black nDLC Steel Optic Ready/Serrated Slide, Black Polymer Frame w/Accessory Rail, Textured Polymer Grip, Ambidextrous
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(0)
GLOCK G21 GEN 5
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(0)
Glock PA215S203MOS 21 PA215S203MOS Gen5 MOS 45ACP 4.61 3 13RD
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(2)
Glock G21SF .45 ACP Short Frame Pistol, Black - PF21502
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(0)
Glock G21 Gen4 .45 Auto 4.6 Inch Barrel Black Fixed Sights 10 Round Mag
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(0)
GLOCK G21 G5 MOS 45 ACP Striker Fired Semi-Auto Pistol - 4.61" - Gas Nitride - 10rd
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(0)
Glock G21 G5 MOS .45 ACP Semi Auto Pistol - 13+1 Rounds, 4.61" Barrel, Polymer Grips, Two-Tone, Glock Fixed Rear Sights
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Flat Dark Earth
(15)
Glock 21SF Gen 3 .45 ACP Pistol, Black - PF2150201
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Black
(10)
Glock 21 Gen 4 .45 ACP Pistol - PG21502
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
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:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Grey
(0)
Glock Glock Glock 21 Gen 4, .45 Acp, 4.61" Barrel, Burnt Bronze Flag, 13-Rd, US Made, Ivs Exclusive UG2150204-BBBWFLAG
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Burnt Bronze
(9)
GLOCK G21 GEN 4
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(0)
Glock G21 G5 MOS Grey / Black .45 ACP 4.61" Barrel 10-Rounds
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Grey
(0)
Glock G21 G5 MOS Flat Dark Earth / Black .45 ACP 4.61" Barrel 10-Rounds
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Flat Dark Earth
(0)
Glock G21 G4 Gray 45Acp 13+1 4.6" FS PG2150203GF
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Grey
(0)
Glock G21 G4 Gray 45Acp 10+1 FS PG2150201GF
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Grey
(0)
Glock G21 G4 Full Gray 45Acp 13+1 PG2150204GF 764503913426
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Grey
(0)
Glock G21 G4 Full Fde 45Acp 13+1 FS PG2150204D
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Flat Dark Earth
(0)
Glock G21 G4 Fde 45Acp 10+1 4.6" FS PG2150201D
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
10
Finish Per Color:
Flat Dark Earth
(2)
GLOCK G21
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
13
(0)
Glock 21SF .45ACP 4.6-inch Barrel 13rd Glock Rail
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.61"
Caliber:
.45 ACP
Capacity:
13
Finish Per Color:
Black
(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
(0)
GLOCK 21G4 45AP PST 10RD SSPVD
Brand:
Glock
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
.45 ACP
Capacity:
10
Marketplace Insights
★ 4.6/5
based on 24 customer reviews across 36 products from 9 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.
