Welcome to the NEW Cheaper Than Dirt online store! Same great prices and availability, now optimized for your mobile phone!

GLOCK 21 .45 ACP Magazine, 13 Rounds, OEM GLOCK, Fits Gen 2, Gen 3, Gen 4

Ships from Warehouse 1
Typically ships the same business day when ordered before 4pm CST.
Add To Wishlist Tell A Friend
Can we ship this to you?
Buying extra magazines for your GLOCK so you can visit the range without spending most of your time reloading magazines can turn a good day into a great one. This is a genuine factory GLOCK 21 magazine designed to work in all previous versions of the GLOCK 21 including the new Generation 4. It features the double cut magazine body and will work if you have reversed your magazine release on your Gen 4 GLOCK 21. The magazine is constructed from black polymer and has a metal spring.

Specifications and Features:
.45 ACP
13 Round Capacity
GLOCK Factory Part
Flat Base-plate
Generation 4 compatible with double cut body



Item#: MAG-250
Total number of Reviews: 14

Submit a review

5.0 5
"This Mag will fit the new 4th Gen G21 SF model and 3rd Gen. M21's. As with all Glock products, quailty is great. CTD shipping arrived within 2 days of order being placed."
4.0 5
"Glock factory mags work 100% After the first mags was run through the follower was pointing straight up. I simply pushed it back in and never saw that problem again. This happened with only one mag out of several. All Glock mags have worked flawlessly."
5.0 5
"This mag fit perfectly in my 4th Generation Glock 21 SF. I bought 6 of these at once and haven't had any problems whatsoever with any of them! Highly recommend!"
5.0 5
"These mags exceeded my expectations. Good price, high quality glock factory mags fit my glock 21 SF perfectly. Function perfectly with FMJ and JHP. Stocking up on some more...."
5.0 5
"a factory glock mag for $19. how can you go wrong? BUY IT. BUY SEVERAL."
5.0 5
"These mags fit my Glock 21 like a glove, nice, have the extra three rounds compared to the 10 round mags my Glock came with!"
5.0 5
"I do a lot of competition shooting so it's important for me to have as much ammo per mag as is possible and for a .45 acp that isn't always easy. This mag holds 13 rounds of .45 acp and, unlike some new mags that can't get them all inside, these fit the full capacity right out of the package and they feed with no problems. Dependable mag!"
5.0 5
"Product is as advertised. Factory Glock, holds 13 rounds. New style follower and \"fully metal lined\""
5.0 5
"Perfect Glock mag. Fit perfect, Fed perfect. For this price I must buy more!"
5.0 5
"These mags load easier than my origanal 10rd. ones. Work without any trouble. Could not ask for a better deal now that the price is down. Buy at least 2 or you will wish you did."
5.0 5
"Got me another mag, works out great. Dont have to say much more then that with a Glock do you? Gonna get me some more also."
5.0 5
"Right after the ban on hi cap magazines, we all would have paid a hundred for the same mag. They are exactly what I would expect from Glock. I could not be more pleased. I will pick up a few more while they are being offered. Better to have than to want!"
5.0 5
"This is a great product. Flawless performance. CheapThanDirt offers them at competitive prices."
5.0 5
"Iif you are going to buy a mag for your Glock then always get factory glock mags! Yet another one that Ive bought from CTD that works flawlessly. added a 2 round extension to it and it still works great. No problems here."