The Glock 21 is a full size .45 ACP pistol made in the Glock tradition of durable, light weight, high reliability, polymer frame pistols. I purchased my 21SF as my first pistol in .45 ACP.
I don’t know why, but shooting it is a lot of fun. Maybe that’s because the holes it makes are big enough for me to see with my poor eyesight. The only downside is cost. Shooting .45 caliber costs over 50% more than shooting 9mm. I shoot a lot of rounds at the range and buy a couple thousand rounds at a time so shooting .45 is more expensive for me.
Concealed Carry – The Glock 21 is a large pistol. It is wide to accommodate the 13 round staggered magazine. Although some do carry it concealed, it’s large size requires more planning than carrying something like a Glock 19. A comfortable shoulder holster is a good bet for carrying the big Glock concealed or any other large size gun for that matter.
Holsters – There are many holsters available for the Glock 21. The models with piccatinny rail require a wider holster designed specifically for the rail.
The standard Sights have the white dot front with whit outline rear. This type of sight provides easy sight acquisition and is plenty accurate for a self defense or home defense pistol. I replaced my standard sights with a set of Big Dot sights. The Big Dot sight is made for fast target acquisition and enough accuracy for self defense. They are not suitable for target sights but are excellent for any self defense scenario where fast acquisition is required. The correct Big Dot sight picture is a lolipop that consists of a big dot top sitting on a single line. The Big Dot is a Glock night sight.
Accuracy – This large is handgun is more accurate than I am. I can easily shoot 6 inch groups and sometimes smaller groups at 15 yards. This is plenty accurate for my purposes.
Glock 21 vs. Glock 21SF – These are pretty much the same pistol except that the 21SF Short Frame version has a .12 inch smaller grip size front to back.
Prices – I found my Glock 45 pistol for sale at Scheels for $599.00. Buds Gun Shop had then for $537.00 shipped to your FFL. The price for a used Glock 21 isn’t much savings so I prefer to buy a new Glock.
Recoil – The recoil is noticeably more than any 9mm I have shot except the Kimber Solo shooting +P Golden Saber, but the large size of the G21 makes it a comfortable .45ACP to shoot.
The magazine holds 13 rounds of .45 ACP. The 21SF magazines are interchangeable except that the models with ambidextrous magazine release won’t release the older non ambidextrous magazines.
The Gen 4 grip size is adjustable. Two additional back straps are provided to provide a range of grip sizes. Another difference is in the Glock recoil spring. The Gen 3 uses a full length recoil spring and the Gen 4 uses a compound recoil spring which is designed to reduce recoil. The compound recoil spring in the picture is from a Glock 30 and is shorter than a Glock 21 Gen 4 recoil spring.
Glock RTF (rough textured frame), refers to the texture dots on the grip sides and front and back strap. First and second generation Glocks had a smooth frame surface. The RTF feature was introduced in 2009.
Disassembly for cleaning is the same as for any Glock. Pull the slide back about .5 inch to allow the take down lever to be pulled up. Dry fire to release the striker, and remove the slide off the front of the frame. The Glock 21 Frame is nylon polymer and requires little cleaning and very little lube. The Glock slide is CNC machined from a solid billet of quality gun steel. The slide assembly breaks down for cleaning by removing the Glock Recoil Spring, and removing the Glock barrel. The Glock barrel is rifled using a polygonal shape that provides a better gas seal and closely resembles a circle in shape.
Glock 17 vs. Glock 21 – The Glock 21 is wider than the Glock 17, a little heavier, other than that they are very similar in size.
Glock 21 vs. 1911 – The main differences are magazine capacity,13 rounds vs. 6 rounds, weight,26.28 Oz. vs. 38 Oz and appearance. The Glock is just not as nice looking as my Kimber 1911 Crimson Carry. But, I would much rather have my Glock 21SF in a gun fight where 13 very big holes wins over 6 big holes every time.
Glock 21 vs. XD 45 – There really isn’t much comparison to make. The Glock is the real deal and the XD 45 looks similar. The XD 45 is heavier, has the same magazine 13 + 1 capacity, and the price is about the same. The XD has a grip safety and the G21 uses the Glock Safe Action system. When in doubt, buy the Glock.
Glock 21 Specs
- CALIBER .45 ACP
- WEIGHT Empty 26.28 oz.
- WEIGHT Loaded 38.28 oz.
- LENGTH 7.59 in.
- HEIGHT 5.47 in.
- MAG. CAPACITY 13
- WIDTH 1.27 in.
- TRIGGER PULL 5.5 lbs.
- TRIGGER TRAVEL 0.5 in.
- LINE OF SIGHT 6.77 in.
- BARREL LENGTH 4.60 in.
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