Among instantly recognizable handguns is the GLOCK. But GLOCK large-frame guns are often overlooked.
Those include the GLOCK Model 20 10mm and GLOCK Model 21 .45 ACP pistol. Introduced in 1990, the Model 21 in .45 ACP competes with other large-caliber pistols in police service. Americans tend to demand more smash in their defensive handguns, and my own views in that regard are four-square American.
The pistol has been well received. Good reliability and accuracy are good selling points. Another strong point is that the magazine holds 13 rounds of .45 ACP cartridges, giving the pistol a total capacity of 14.
A disadvantage of the pistol is its size. Female shooters with small hands and long fingers often do well with the GLOCK 21, although training and absolute familiarity with the type are essential. While the pistol is large due to the polymer frame, it is light enough.
When you consider the whole picture, the GLOCK offers considerable firepower in a light package. For example, the original Colt 1911 Government Model in the same caliber weighs 39 ounces. The present service pistol, the 9mm Beretta 92, weighs 35 ounces and offers 15 rounds of the less-effective 9mm cartridge.
Another GLOCK advantage is simplicity. The safe action design offers only one trigger action to learn in contrast to double-action, first-shot pistols that demand you learn both double-action and single-action fire. There is no manual safety.
The lever in the trigger is not a true safety; it is a drop safety intended to prevent inertia from moving the trigger if you drop the pistol. The GLOCK safe-action trigger preps when you rack the slide, with the trigger forward under pressure. The striker ,or firing pin, partially cocks at that point. By continuing to press the trigger, the striker presses to the rear, breaks against spring pressure and flies forward, firing the pistol. As the slide recoils, the action partially preps, and you may fire the pistol with another short trigger press.
The GLOCK safe action has proven reliable in action and offers a trigger that is easily learned quickly. While there is no manual safety, true safety is between the ears, and a GLOCK shooter must understand to keep the finger off of the trigger until ready to fire.
The GLOCK Model 21 has proven as reliable as the other GLOCK pistols, which means reliability is held to a high standard. Compared to other .45 ACP pistols, the GLOCK Model 21 offers moderately felt recoil. Despite the its light weight, the polymer frame gives a bit in recoil, and the large grip distributes recoil out on the palm. The GLOCK Model 21 is among the lightest recoiling pistols in .45 ACP caliber.
Coupled with a lower bore axis than many others, the result is a pistol that is controllable and accurate in combat shooting. The GLOCK Model 21 is also one of the most consistently accurate among GLOCK pistols. Some GLOCK types are not noted for good accuracy, and the Model 21 often turns in excellent results.
Like all quality handguns, the GLOCK Model 21 works better with one type of ammunition than another, yet the level of accuracy is often high for a service-grade pistol. Cycle reliability is good with all types of ammunition. +P-rated ammunition is not recommended for several reasons.
- The GLOCK has a generous barrel/chamber area throating, which relieves the section of the chamber that supports the case head.
- The result is a feed ramp that feeds practically any bullet design with reliability; however, a +P load may result in a bulged case.
- Standard .45 ACP ammunition is controllable and effective, and +P loads are not needed for military use or personal defense.
Many will note that the illustrated pistol is one of the first GLOCK Model 21s. The newer versions have a much improved grip with finger grooves. The newest handguns have interchangeable grip inserts and are more accurate than my original version.
Just the same, that old Model 21 is still serviceable. I strongly recommend seeking out the new versions; I have never seen a bad M21, and the newer ones are better.
When testing the GLOCK Model 21 used in this feature, I deployed it in a Don Hume service-grade thumbreak holster. It is an excellent, all-around design that demonstrates a good balance of speed and retention.
- The holster is molded properly for the GLOCK.
- The thumbreak is reinforced to avoid binding.
- The stitching is professional grade.
The GLOCK pistol illustrated has fired many thousands of rounds during its service life. For the purposes of this review, I fired it with a variety of service-grade ammunition.
- I fired five-shot groups from a solid bench rest at the 25-yard mark.
- The pistol turned in good-to-outstanding accuracy.
- The Trijicon sights clearly added an advantage because their sight picture is superior to the factory unit.
- Average of three, 5-shot groups
- 75 feet
|CCI Blazer 230-Grain FMJ||3.4 inches|
|Speer 230-Grain Gold Dot||2.5 inches|
|Federal 230-Grain HST||2.8 inches|
|PMC 230-Grain Bronze||4.0 inches|
|Wolf 230-Grain FMJ||3.8 inches|
Did you have or use the original GLOCK 21? What about the new one? Share your thoughts in the comments section.
Bob Campbell is a former peace officer and published author with over 40 years combined shooting and police and security experience. Bob holds a degree in Criminal Justice. Bob is the author of the books, The Handgun in Personal Defense, Holsters for Combat and Concealed Carry, The 1911 Automatic Pistol, The Gun Digest Book of Personal Protection and Home Defense, The Shooters Guide to the 1911, The Hunter and the Hunted, and The Complete Illustrated Manual of Handgun Skills. His latest book is Dealing with the Great Ammo Shortage. He is also a regular contributor to Gun Tests, American Gunsmith, Small Arms Review, Gun Digest, Concealed Carry Magazine, Knife World, Women and Guns, Handloader and other publications. Bob is well-known for his firearm testing.
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