Glock Number System - A common question for new Glock buyers is "What is my Glock?" Until the 4th generation, Glock was not officially recognized beyond the model number, which led to the notion that "a Glock is a Glock is a Glock - they're all the same." But the first collectors noticed the differences and informally settled on three main continuums or classifiable "generations". Surnames became commonplace on Glock with the release of the 4th Gen in 2008, and their promotional literature now features earlier Gens in some places.

The image below will help you know exactly which version your Glock is, but be aware that there is a lot of overlap as models change slowly. Also, 3rd gen guns are still being manufactured due to California gun restrictions, so you may have a 5th gen gun that outdates your 3rd gen guns! Image notes identify key features that are consistent throughout a generation, but minor changes in features and interior design can be found at different intervals, sometimes back and forth within the same gene. Thus, severe separation between generations is limited. Many parts can be replaced by two or more major frame modifications, but some changes last only a short time per generation.

Glock Number System

Glock Number System

The first generation is constantly changing. Although the initial design is reliable, it is still under development. A handy feature is the texture that wraps around the handle (no front or back strap checks). It feels smoother compared to the next gen and is considered by collectors to be a "winter texture". The first gun has a thin barrel made of stainless steel, which is installed at the head (no more than the prefix AD) and the thickness of the wall of the barrel does not exceed the prefix AN. Many variations are also available in magazines and small interiors. All guns will have Austrian markings, but no juxtaposition or number of markings. Original rifles (pre-US) and European market rifles did not have serial numbers on the frame. Many of the early rifles were equipped with targets known as "Weak Spots" because of their fragility. Standard (fixed) visibility is also a valid term, but the targeted version commands a premium. All frames have half-moon holes at the bottom of the front straps, except for a few 19's produced.

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The second generation is what many beginning collectors and even uninformed dealers call "Gen 1". The confusion stems from two factors: 1. The first generation is rare and many casual observers may not have seen it before. 2. Many models were introduced in the 2nd Gen family and some considered it the "1st Generation" because it was the first release of that model. To clarify, if you have a model 20 or higher, you have a Gen 2 Glock, even if it is the first version of the gun. The obvious difference between the 1 and 2 for the 17-19 model is the addition of controls to the front and back straps, as well as a change in the texture of the side panels (deeper than the 1st generation). The second generation saw the introduction of five more calibers, and all non-.380 / 9mm rifles were equipped with a second locking pin to prevent further frame breakage. It is important to note that the number of needles does not determine the generation as many people believe. The 9mm frame has only two pins from the Gen 1 well to the Gen 3 production, while all calibers have 3 pins. All full-size frames are placed on top of the mag well relief at the base of the front straps.

By the late 90s, Glock had become a dominant force in the US gun market, and other manufacturers tried to copy the design. This led to some pressure to "innovate" the Glock design in order to maintain the lead of the pack. The Gen 3 transformation actually began in 1995 with the launch of the compact model. This grip is considered to be too small for most people, so finger grooves are created as a front line of action to increase resistance. Rotation due to rotation. In '98, a three-year transformation began before the full transformation reached all models. Some large frame transition schemes are rare (especially in ported variations) - see https:///transitional/ for more info. The 3rd generation has a finger groove, a front strap, a thumb grip on the top of the grip, and an extra rail tucked into the dust cover. As mentioned above, for the 9mm size only, you can still find the 2-pin design in the original Gen 3 process. The frame was adapted for all 3 pins in the early 2000s.

By the time the fourth generation began, Glock had become the norm for "pistols," but once again faced competitors with innovative designs. One of the most popular things that appeals to consumers is that the back strap can be adjusted to better fit different hand sizes. Glock was first tested with a smaller grip on the Gen 3 SF models (which were only available in .45 and 10mm sizes). A modular backstrap system brings SF proportions to all frames with the ability to double zoom and even integrate a beavertail adapter. The interior was redesigned from the ground up and built with the exact .40S & W recoil profile in mind, then shortened to 9mm (where Gen 1-3 was designed the opposite way). It should be confirmed to make the .40 model durable while continuing the legendary reliability of the 9s. The grip texture has also been changed to an aggressive pattern on the side panels - this is also the first time a 3rd generation rifle with the so-called "RTF2" texture has been tested for a short time. RTF2s are technically Gen 3, probably Gen 3.5, and were only produced from 2009 to 2011 (with the exception of occasional special editions). See the image at the bottom of this page.

The first 5th generation models were of course before the release of the 42 & 43 mini cable models. These models were redesigned with all new internal components to accommodate the smaller dimensions, and the FBI played a role in these changes. Out of the cannons with their proposal on the M model. The 19X, 42, 43, 43X, 44, 45, and 48 technically did not use the Gen 5 design in the slide, but were never the closest match to the other Gen 5 rifles. The 17 and 19 series were officially released in 2017 as Gen 5s and have been followed by other 9mm and .40 S&W offerings, but no .357 Sig, 10mm, or .45 offerings yet. No ACP. Significant changes to the Note include the "marker" tank, fully unequal steering, magwell lights and the removal of the front wire finger grooves.

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There are (at least) two additional designs that are either generational differences or hard to tell from the wording above: 1. RTF2 Third Generation and 2. FBI M Series.

RTF2 is short for "Second Rough Texture Frame". The first version was created as a prototype and never produced, but at least one is on display at the Cody Firearms Museum. Designers settled on the second version, and new molds were created to incorporate this grip texture into the standard design of the third generation. All the internals are the same, so the only difference is the texture of the handle. As you can see from the exploded photos, the entire grip is covered in little pyramids and let me tell you - they are! This gun will definitely stay in your hands even when wet. The Glock was primarily marketed to police from 2009 to 2011, but the design was a clear step between the 3rd and 4th generation guns. The pyramid concept is carried forward, but with a larger pyramid, because RTF2 is easy to wear and even wear out. See https:///rtf2g/ for more images.

Finally, we also have to talk about the FBI M Series pistols. The 17M & 19M really took the lead and probably inspired the Gen 5 rifle. They were developed to specifications required by the FBI as a new departmental service weapon and incorporated some design changes and new concepts from the Mini 42/43. These were the first Glocks with modifications to the weapon designed to improve handling and accuracy. While the M Rifles look and feel almost identical to the Gen 5 on the outside, the main difference is the interior, so most collectors consider them part of the Gen 5 family. But for the right people, the "M" added to the pattern definition makes a big difference in their preferred meaning.

Glock Number System

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