Glock 17 Gen 4 "fourth-generation" full-size model
|Place of origin|
|Used by||See Users|
|No. built||5,000,000 as of 2007|
|Glock 18 : 1,100 - 1,200 RPM (Rounds Per Minute)|
|375 m/s (1,230 ft/s) (Glock 17, 17C, 18, 18C)|
|Effective firing range||50 |
|Feed system||10, 15, 17, 19, 31, 33 or 50 round drum |
The Glock is a series of
Despite initial resistance from the market to accept a perceived "plastic gun" due to both unfounded durability and reliability concerns, as well as fears that its use of a polymer frame might circumvent
The company's founder, engineer
In 1980, the
Glock became aware of the
Several samples of the 9×19mm Glock 17 (so named because it was the 17th patent procured by the company) were submitted for assessment trials in early 1982, and after passing all of the exhaustive endurance and abuse tests, the Glock emerged as the winner.
The handgun was adopted into service with the Austrian military and police forces in 1982 as the P80 (Pistole 80), with an initial order for 25,000 guns. The Glock 17 outperformed eight different pistols from five other established manufacturers (
The results of the Austrian trials sparked a wave of interest in Western Europe and overseas, particularly in the United States, where a similar effort to select a service-wide replacement for the
Shortly thereafter, the Glock 17 was accepted into service with the
Glock has updated its basic design several times throughout its production history.
A mid-life upgrade to the Glock pistols involved the addition of checkering on the front strap and serrations to the back strap. These versions, introduced in 1988, were informally referred to as "second-generation" models. To meet American
In 1998, the frame was further modified with an accessory rail (called the "Universal Glock rail") to allow the mounting of
The polymer frames of third-generation models can be black, flat dark earth, or
In 2009, the Glock 22 RTF2 (Rough Textured Frame 2) (chambered in .40 S&W) was introduced. This pistol featured a new checkering texture around the grip and new scalloped (fish gill-shaped) serrations at the rear of the sides of the slide. Many of the existing models became available in the RTF2 version, including the 31, 32, 23, 21, 19. Some of those did not have the fish gills.
At the 2010
The basic grip size of the fourth-generation Glock pistols is slightly smaller compared to the previous design. A punch is provided to remove the standard trigger housing pin and replace it with the longer cross pin needed to mount the medium or large backstrap that will increase the trigger distance by 2 mm (0.079 in) or 4 mm (0.16 in). With the medium backstrap installed, the grip size is identical to the third-generation pistols. The magazine release catches are enlarged and reversible for left-handed use. To use the exchangeable magazine release feature, fourth-generation Glock magazines have a notch cut on both sides of the magazine body. Earlier versions of the magazines will not lock into the Gen4 pistols if the user has moved the magazine release button to be operated by a left-handed user. Gen4 magazines will work in older models.
Mechanically, fourth-generation Glock pistols are fitted with a dual recoil spring assembly to help reduce perceived recoil and increase service life expectancy. Earlier subcompact Glock models such as the Glock 26 and Glock 30 have already used a dual recoil spring assembly which was carried over to the fourth-generation versions of those models. The slide and barrel shelf have been resized, and the front portion of the polymer frame has been widened and internally enlarged, to accommodate the dual recoil spring assembly. The trigger mechanism housing has also been modified to fit into the smaller-sized grip space.
The introduction of fourth-generation Glock pistols continued in July 2010 when the Glock 19 and Glock 23, the reduced size "compact" versions of the Glock 17 and Glock 22, became available for retail. In late 2010, Glock continued the introduction of fourth-generation models with the Glock 26 and Glock 27 "subcompact" variants.
In January 2013, more fourth-generation Glock pistols were introduced commercially during the annual SHOT Show, including the Glock 20 Generation 4 along with other fourth-generation Glock models.
In September 2011, Glock announced a recoil spring exchange program in which the manufacturer voluntarily offers to exchange the recoil spring assemblies of its fourth-generation pistols (with the exception of the "subcompact" Glock 26 and Glock 27 models) sold before 22 July 2011 at no cost "to ensure our products perform up to GLOCK’s stringent standards", according to the company.
On 29 June 2016 the United States Federal Bureau of Investigation (FBI) awarded a contract to Glock to provide new 9×19mm Parabellum chambered duty pistols. The solicitation specifications deviated from the specifications of Glock fourth-generation models.
In August 2016 the Indianapolis Metro Police Department (IMPD) started training with a batch of Glock 17M pistols. The most obvious difference with the Glock third and fourth-generation models on published images is the omission of finger grooves on the grip. The IMPD issued a Glock 17M voluntary recall following failures encountered while dry firing the pistols during training. According to Major Riddle with the IMPD; "Glock is working to correct the problem and we hope to begin issuing the new [17Ms] as soon as December".
In August 2017, Glock presented the "fifth generation" or "Gen5". The revisions centered on ergonomics and improving reliability. Many parts of fifth-generation Glock pistols cannot be interchanged with those of the previous generations. The two fifth-generation models announced were the Glock 17 and Glock 19, chambered for the 9×19 mm Parabellum. Some conspicuous changes on the fifth-generation models are: ambidextrous slide stop levers, nDLC (