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The Glock is a series of polymer – framed gkock, short recoil -operated, locked-breech semi-automatic pistols designed and produced by Austrian manufacturer Glock Ges. It entered Austrian military and police glok by after it was the top performer in reliability and safety tests. 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 metal detectors in airports, Glock pistols have become the company’s most profitable line of products as well as supplying national armed forces, security agencies, and police forces in at least 48 countries.
The company’s founder, engineer Gaston Glockhad no experience with firearms design or manufacture at the time their first pistol, the Glock 17, was being prototyped. Glock did, however, have extensive experience in advanced synthetic polymersknowledge of which was instrumental in the company’s design of the first commercially successful line of pistols with a polymer frame. Glock became aware of the Arkorers Army ‘s planned procurement, and in assembled a manaul of Europe’s leading handgun experts from military, police, and civilian sport-shooting circles to define the most desirable characteristics in a combat pistol.
The handgun was adopted into service with the Austrian military and police forces in as the P80 Pistole 80 with an initial order for 25, guns. 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 M had been going on since the late s known as the Joint Service Small Arms Program.
In latethe United States Department of Defense inquired about the Glock pistol and received four samples of the Glock 17 for unofficial evaluation. Shortly thereafter, the Glock 17 was accepted into service with the Norwegian and Swedish armed forces, surpassing all prior NATO durability standards.
Starting in the British Army began replacing the Browning Hi-Power pistol with the Glock 17 Gen 4, due to concerns about weight and the external safety of the Hi-Power.
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 inwere informally referred to as “second-generation” models. To meet American ATF regulations, a steel plate with a stamped serial number was embedded into the receiver in front of the trigger guard.
The Unofficial Glock Armorer’s Manual
Inan integrated recoil spring assembly replaced the original two-piece recoil spring and tube design. The magazine was slightly modified, changing the floorplate and fitting the follower spring with a resistance insert at its base. Inthe frame was further modified with an accessory rail called the “Universal Glock rail” to allow the mounting of laser sightstactical lightsand other accessories. Thumb rests on armroers sides of the frame and finger grooves on the front strap were added.
2009 Glock Armorer’s Manual
Glock pistols with these upgrades are informally referred to as early “third-generation” models. Later third-generation models additionally featured a modified extractor that serves as a loaded chamber 2100and the locking block was enlarged, along with the addition of an extra cross pin to aid the distribution of bolt thrust forces exerted by the locking block.
This cross pin is known as the locking block pin and is located above the trigger pin. The polymer frames of third-generation models can be black, flat dark earth, or olive drab. Besides armoers, non-firing dummy glocj “P” models and non-firing dummy pistols with resetting triggers “R” models have a bright red frame and Simunition -adapted practice pistols “T” models — a bright blue frame for easy identification.
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. Some of those did not have the fish gills.
Updates centered on ergonomics and the recoil spring assembly. The pistols were displayed with a modified rough-textured frame, grip checkering, and 20010 backstraps of different sizes.
The Unofficial Glock Armorer’s Manual | Carolina Shooters Club
The basic grip size of the fourth-generation Glock 200 is slightly smaller compared to the previous design. With the medium backstrap installed, the grip glokc 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 when the Glock 19 and Glock 23, the reduced size “compact” versions of the Glock 17 and Glock 22, became available for retail.
In Januarymore 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.
The most obvious difference with the Glock third and fourth-generation models on published images is the omission of finger grooves on the grip. In AugustGlock 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. Some conspicuous changes on the fifth-generation models are: The locking block pin located above the trigger pin that was introduced in the third-generation is omitted.
Many internal parts were less conspicuously revised. The magazines were also revised for the fifth-generation models. The redesigned magazine floor plates feature a frontward protruding lip to offer grip for manual assisted extraction and the magazine follower became orange colored for easier visual identification.
The Glock 17 is a 9 mm short recoil —operated, locked-breech semi-automatic pistol that uses a modified Browning cam-lock system adapted from the Hi-Power pistol. A ramped lug extension at the base of the barrel then interacts with a tapered locking block integrated into the frame, forcing the barrel down and unlocking manua from the slide. This camming action terminates the barrel’s movement while the slide continues back under recoil, extracting and ejecting the spent cartridge casing.
The slide’s armoters rearward movement and counter-recoil cycle are characteristic of the Browning system. The slide features a spring-loaded claw extractorand the gllock sheet metal ejector is pinned to the trigger mechanism housing. When a cartridge is present in the chamber, a tactile metal edge protrudes slightly out immediately behind the ejection port on the right side of the slide.
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As the trigger is pulled, the firing pin is then fully cocked. At the end of armorsrs travel, the trigger bar is tilted downward by the connector, releasing the firing pin to fire the cartridge. The connector resets the trigger bar so glpck the firing pin will be captured in half-cock at the end of the firing cycle.
This is known as a preset trigger mechanism, referred to as the ” Safe Action ” trigger by the manufacturer.
The connector ensures the pistol can only fire semiautomatically. The factory-standard, two-stage trigger has a trigger travel of In response to a request made by American law enforcement agencies gloxk a two-stage trigger with increased trigger pull, Glock introduced the NY1 New York trigger module, which features a flat spring in a plastic housing that replaces the trigger bar’s standard coil spring.
This trigger modification is available in two versions: The Glock’s frame, magazine body, and several other components are made from a high-strength nylon -based polymer invented by Gaston Glock, called Polymer 2. The mabual guard itself is squared off at the front and checkered. It is retained in the frame by a steel axis pin that holds the trigger and slide catch. The trigger housing is held to the frame by means of a polymer pin. A spring-loaded sheet-metal pressing serves as the slide catch, which is secured from unintentional manipulation by a raised guard molded into the frame.
The Glock pistol has a relatively low slide profile, which holds the barrel axis close to the shooter’s hand and makes the pistol more comfortable to fire by reducing muzzle rise and allows for faster aim recovery in rapid firing sequences. The rectangular slide is milled from a single block of ordnance-grade steel using CNC machinery.
After applying the nitriding process, a black Parkerized decorative surface finish is applied. The underlying nitriding treatment will remain, protecting these parts even if the decorative surface finish were to glocj off. A current production Glock 17 consists of 34 parts. The hammer-forged barrel has a female type polygonal rifling with a right-hand twist. The stabilization of the round is not by conventional riflingusing lands and grooves, but rather through a polygonal profile consisting of a series of six or eight interconnected noncircular segments only the.
Each depressed segment within the interior of the barrel is the equivalent admorers a groove in a conventional barrel. Thus, the interior of the barrel consists of smooth arcs of steel rather than sharply defined slots. The method by which Glock barrels are rifled is somewhat unusual; instead of using a traditional broaching machine to cut the rifling into the bore, the Glock process involves beating a slowly rotating mandrel through the bore to obtain the hexagonal or octagonal shape.
This has the advantage afmorers providing a better gas seal behind the projectile as the bore has a slightly smaller diameter, which translates into more efficient use of the combustion gases trapped behind the bullet,  slightly greater consistency in muzzle velocities, and increased accuracy and ease of maintenance.
Glock pistols are designed with three independent safety mechanisms to prevent accidental discharge. The system, designated “Safe Action” by Glock, consists of an external integrated trigger safety and two automatic internal safeties: Pressing armoers lever activates the trigger bar and sheet metal connector. The firing pin safety is a solid hardened steel pin that, in the secured state, blocks the firing pin channel disabling the firing armorees in its glick axis.
It is pushed upward to release the firing pin for firing only when the trigger is actuated and the safety is pushed up agmorers the gock movement of the trigger bar. The drop safety guides the trigger bar in a ramp that is released only when direct rearward pressure is applied to the trigger.
The three safety mechanisms are automatically disengaged one after the other when the trigger is squeezed, and are automatically reactivated when the trigger is released.
The ability to fire immediately, without worrying about an external safety, is one feature Glock has stressed as an advantage when selling its guns, especially to police departments. The ILS is a manually activated lock located in the back of the pistol’s grip. It is cylindrical in design and, according to Glock, each key is unique. When activated, the lock causes a tab to protrude from the rear of the grip, giving both a visual and tactile indication as to whether the lock is engaged or not.
When activated, the ILS renders the Glock unfireable, as well as making it impossible to disassemble. When disengaged, the ILS adds no further safety mechanisms to the Glock pistol. The ILS is available as an option on most Glocj pistols.
Glock pistols cannot be retrofitted to accommodate the ILS. The lock must be factory built in Austria and shipped as a special order. The Glock 17 feeds from staggered-column or double stack magazines that have atmorers round capacity which can be extended to 19 with an optional floor plate or optional round high-capacity magazines.
The magazines are made of steel and are overmolded with plastic. A steel spring drives a 20010 follower. After the last cartridge has been fired, the slide remains open on the slide stop.
The slide stop release lever is located on the left side of the frame directly beneath the slide and can be manipulated by the thumb of the right-handed shooter.