Glock Guns News: the Generations of Glock 9mm

Welcome to our first article of 2017, it is with great honor and pleasure that we inaugurate this year with a new article on one of the most famous pistols ever created, an article about Glock 9mm Generations. We already wrote at the history of this company. We have seen how Gaston Glock traveled from the manufacture of curtain rings to the making of military accessories until finally when he began to produce his pistols and supplies them to the Austrian Army and military and police forces around the world.


These pistols underwent changes and improvements, new models were introduced to their production line and consequently to the market. All this culminated in what we call Generation, Glock pistols, in particular, have, until today, 4 generations, and in this article we will tell the history of their generations and their particularities.


Glock 9MM G17 Generation 1

The pistols of  Generation 1, are of 1982-1987 / 88. The pistols manufactured in this generation were the G17 and G18, both in 9mm Parabellum. The handle of this generation’s weapons were fully textured. The walls of their pipes were thinner, so they were known as “Pencil Barrel”, the recoil spring and the bolt guide were made separately, their chargers were made of plastic and their “Dust Cover” was rounded (part in front of the guard that covers the recoil spring).


Model 18 and 18C pistols were made for the Austrian Army’s counter-terrorism unit, the EKO Cobra unit. The gun 18 is the variation with selector of shots of the model 17, that is, this weapon fires in automatic mode, its cadence of shots is of 1200 shots per minute.


Left knob without serrated texture of G17 and right trigger with serrated texture of G19.

Only a few dozen Glock G19s were made in the first generation, they were sample prototypes for the ATF (Alcohol, Tobacco and Firearms – US Agency for Firearms, Alcohol, and Tobacco) to examine. Glocks G19 have a “serrated” trigger instead of the “soft” trigger of the Glock 17. The G19’s barrel has the recess hole in a different location from that of the G17 and this is one of the reasons why they are not interchangeable with each other.



In 1988 the second generation was launched. The main change that marked this generation was the retexturization of the cable of the weapon. This time his cable had textured rectangles around the handle of the weapon. The charger was now made of metal, which greatly improved the power to the camera. The walls of the gun barrel were thicker, the recoil spring and the bolt guide were made together.


By 1990, the company introduced its 20 (10mm), 21 (.45 ACP), 22 and 23 (both .40 S & W) models. Models 22 and 23 are actually models 17 and 19, but in .40 S & W; however, with a more powerful caliber, it forced the designers to add an extra pin to retain the bolt lock. Some rare and new versions of these pistols may not have this 3rd pin. Models 20 and 21 were the first models to be made with the weapon with a larger body. This was done to accommodate calibers that were larger than the others already made, 10mm and .45 ACP. All these models are from the second generation or later generations, and both have the 3rd bolt locking pin.


A few years later, in 1994, the company started producing the 24 model, which is essentially the 17L 9mm Glock, but in the second generation and in .40 S & W. Some time later the angle of the ejection window was changed from the old 90º to something a little larger. This change occurred during the insertion of models 24, 26 and 27, in .40 S & W, 9mmP and .40 S & W respectively. This means that there are Glocks G24 with the ejection window at 90 ° and larger angles, but the G26 pistols and their rear only exist at the larger angle.


Later versions of the 26 and 27 guns were the first to incorporate grooves to accommodate the fingers, in front of the gun, this version is called 2.5.


GLOCK 9MM Generation 3:  Generation 3 incorporated all the improvements of previous versions and added few changes. The new versions of the pistol were made with grooves at the front of the gun’s wrist, to accommodate the fingers better, but without tactical rails, and an ambidextrous finger rest just above the loader’s retainer.


After the move to generation 3, new models were added, such as the model 29 (10mm) together with the release of ar15 guns, 30 (.45 ACP), 31-33 (.357 SIG), 34 (9mm), 35 (.40 S & W) and to 36 (in .45 ACP, but with the bolt the same size as a pistol in 9mm with the body that was even thinner), the models 37 and 39 (both .45 GAP – Glock Automatic Pistol) were introduced to the market later, these models used a body the same size as a G17 with the bolt of similar size to that of a G29 or G30.


Some of the larger models of 10mm and .45 ACP pistols were made with “Short Frames” – SF – (Small Chassis).


Other changes made in this generation was the introduction of the ambidextrous retainer retention, however, it was incompatible with the old shippers. In 2009 they introduced RTF2 (Rough Textured Frame 2), which consists of a new texturing of the handle of the weapon, this time with small pointed triangles, rest for the big toe just above the retention of the loader, call the pistols with these changes of Gen. 3.5.


Glock 9mm Generation 4, with interchangeable back splints, retains larger and ambidextrous loader and the insertion of tactical rail, RTF3 texture, and telescopic recoil spring.

Generation 4: In 2010 the Generation 4 pistols were presented.  It’s one of the latest developments in Glock. The external changes were few, switching from RTF2 to RTF3, that is, now the texture of the grip is less aggressive than the previous version, has square squares instead of pointed triangles, and has the word Gen4 next to the weapon model , not the bolt.

A new, “telescopic” recoil spring has been created: Two coaxial coil springs are mounted together with their guide, it is smaller, and has a larger tube than the previous version. Its diameter is considerably larger than those of the recovery springs used in previous models of glock 9mm single stack in the industry. To accommodate this new, more bulky spring it was necessary to change the front part of the bolt and the body of the gun, both internally and externally. This change also helped greatly reduce the recoil of the shots, which was something that bothered the operators of this weapon.


In addition in this new generation Glock invested in a new internal security system and has been glock 9mm for sale. In addition to the trigger lock, which was already used in other generations, an extension was now added to the trigger bar, which terminates in a pin located in the channel of the precursor, blocking its action. The other security system added in this version is formed by the trigger bar itself, on the back of the weapon, and has the shape of a “cross”. The two “arms” of this “cross” keep the pistol mechanism locked, preventing it from firing by an accidental fall or when hit by any type of strong impact, such as a shot.

To accommodate different sizes of hands, this generation has a smaller grip than the other generations and the back splints can be changed, increasing or decreasing the distance of the trigger. The retention of the loader has also been changed, this time it is bigger than the seals of previous generations, besides being ambidextrous, that is, it can be altered to be activated both on the left side of the weapon and on the right side, satisfying both left- right-handed.


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