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Glock 21 Pistols

We list 34 Glock 21 pistols. None are in stock right now; the listings stay up so you can see what fits and check back.Every Glock 21 listing we carry. None in stock right now.

0In stock
-Lowest price
4Generations
1Caliber
See every listing Glock store

Listings as of Nov 8, 2026.

Glock 21 Gen 5 MOS 45 ACP 4.61in 17rd Black FinishGen545 ACP · 4.61 in · 17 rd$485.33

Pick your G21

Every G21 generation we list, with the count in stock and the lowest price for each.

Glock G21 V seriesV series4.61 in barrel · 13 rdOut of stock1 listedGlock G21 Gen5Gen54.61 in barrel · 13 rdOut of stock14 listedGlock G21 Gen4Gen44.61 in barrel · 13 rdOut of stock9 listedGlock G21 Gen3Gen34.61 in barrel · 13 rdOut of stock6 listed0G21 pistols in stockShop all

All G21 pistols

0 in stock. Sold out listings stay up, after the ones you can buy today.

1 - 1 of 1 results
GenerationV series 1Gen5 14Gen4 9Gen3 6
FeaturesMOS / optic ready 110 round / state compliant 1
Sort byMost popularPrice: low to highPrice: high to lowClear filters

Built for your G21

Magazines, holsters and parts that fit the G21, from Glock and other makers. Parts ship to your door where your state allows.

All G21 magazines
All 113Magazines 20Holsters 14Grip modules & frames 8Barrels 3Optic plates 4Sights 25Mag extensions 9Triggers 8Lights & lasers 1Other parts 21

About the Glock 21

The Glock 21 is Glock's full size .45 ACP: a 4.61 inch barrel and a 13 round standard magazine. Short frame versions are listed as the G21SF. It is the same size as the Glock 20, so holsters are often listed for them together.

Magazines from the Glock 41 fit it too: they take the same magazine, and theirs are as long or longer. Shop .45 ACP ammo.

Magazines and parts for the G21

We have 113 in-stock accessories made for the G21, from Glock and other makers: 20 magazines, 14 holsters, 8 grip modules & frames, 3 barrels and 4 optic plates. They ship to your door where your state allows.

Buying a handgun online

Magazines and most parts ship to your door where your state allows. Check state restrictions before you order, and read how buying a gun online works. Firearms can go on layaway, and financing shows at checkout when the order qualifies.

1Pick your G21Add it to your cart like anything else.
2Choose your dealerPick a licensed dealer (FFL) near you at checkout. We ship the pistol to them.
3Pick it upFill out the transfer paperwork at the dealer and take it home.

More Glock models

Back to the Glock store
Glock G30G30Subcompact .45 ACPOut of stockGlock G41G41.45 ACP long slideOut of stockGlock G20G20Full size 10mmOut of stockGlock G36G36Slim single stack .45 ACPOut of stock

Glock G21 FAQ

Do you have the Glock 21 in stock?

Not right now. Our G21 listings stay on this page while they are out of stock, so you can see what we carry and check back.

What calibers does the Glock 21 come in?

Our G21 listings are chambered in 45 ACP.

Do you ship Glock 21 pistols to my house?

No. A firearm bought online ships to a licensed dealer (FFL) you pick at checkout, and you fill out the transfer paperwork there. Magazines and most parts ship to your door where your state allows.

Which magazines fit the Glock 21?

We have 20 in-stock magazines that fit the G21 (shop them here). Magazines are made for a given caliber and grip size, so check the fitment line on each listing.