Heckler & Koch G3

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The History of Heckler & Koch

Heckler & Koch was founded in 1948 by Edmund Heckler, Theodor Koch, and Alex Seidel, former Mauser engineers who salvaged materials from the old Mauser arms factory in Oberndorf to start a machine tool plant called the Engineering Office Heckler & Co. The brand was officially registered as Heckler & Koch GmbH in 1949 and initially produced replacement parts and tools for household items and bicycles while also manufacturing firearms.

In 1956, H&K submitted the G3 battle rifle proposal to the German Federal Army, which was based on the Spanish CETME rifle. The G3 was declared the standard rifle of the Bundeswehr in 1959. Over the years, H&K developed various firearms often used by armed forces, such as the HK21 machine gun (1961), MP5 submachine gun (1969), and HK33 assault rifle (1971).

In 1974, the company expanded its product line to include the production of firearms for hunting and sports. H&K was sold to British Aerospace's Royal Ordnance division in 1991, and in the 90s, was awarded contracts to produce updated versions of firearms for Bundeswehr and the US government.

In 2004, H&K won a significant contract for handguns from the US Department of Homeland Security. However, the company has faced allegations of selling small arms to conflict zones and licensing production to governments with poor human rights records, such as Sudan, Thailand, and Myanmar. It has also been suggested that the company found ways to bypass EU export restrictions when its licensed manufacturers sold HK weapons to the areas of conflict.

Throughout the years, Heckler & Koch has presented numerous firearms both for civilian and non-civilian use: from pistols, shotguns, rifles, and machine guns to grenade launchers. Some of the most popular models include the HK A2, HK 416 rifles, the HK P7, P8 and P9 pistols, the HK FP6 shotgun, the civilian use rifles HK 270, HK 630, HK 940, HK SLB 2000, and many others.

In 2019, a Luxembourg-based holding company, Compagnie de Développement de l’Eau (CDE), acquired a controlling stake in Heckler & Koch AG, after being a shareholder for several years. Today, Heckler & Koch's headquarters are still located in Oberndorf in southwest Germany, where they continue to produce a range of firearms for military and law enforcement, as well as weapons for civilian use.

H&K G3 Rifle Review

The H&K G3 is an automatic select-fire battle rifle with a roller-delayed blowback action, developed in collaboration with the Spanish state-owned design and development agency CETME (Centro de Estudios Técnicos de Materiales Especiales) in the 1950s. After upgrades and modifications, the rifle was adopted by the Bundeswehr in 1959 under the name G3, and it remained the standard German military rifle until the introduction of the G36 in the 1990s.

Often referred to as the "AK of the West," the G3 differs quite a lot mechanically from the AK. The rifle has an adjustable gas system and a two-piece bolt assembly comprising a bolt head and carrier. Early models feature mechanical flip-up sights, a folding bipod, a stamped steel handguard, and a wooden or telescoping metal stock.

The G3 is modular, allowing for the interchangeability of components such as the butt-stock, fore-stock, and pistol-grip/fire-control assembly, resulting in various configurations. The rifle features a trigger mechanism with a 3-position fire selector switch, and the rear sight is mechanically adjustable for both windage and elevation, while the hooded front post sight provides accuracy. The barrel is free-floated and has polygonal rifling. The G3 is compatible with steel or aluminum double-stack detachable magazines that can hold 20 cartridges. Additionally, a 50-round drum magazine is also available.

Throughout its service life, the rifle was updated several times, resulting in new improved sights, flash suppressor, and synthetic handguard and shoulder stock. The most recent models include the G3A3 with a fixed polymer stock and the G3A4 with a telescoping adjustable metal stock. There are numerous variants of the rifle based on specific modifications and improvements.

H&K G3, chambered for .308 Win.

Figure 1: H&K G3, chambered for .308 Win. (Source: https://atlanticfirearms.com/ptr-gi-308-rifle-w-o-rail)

H&K G3 Calibers

The rifle can be chambered for the following calibers:

.308 Win.
7.62x51 NATO

H&K G3 Variants

The rifle is available in numerous variants and models under various licenses:

H&K G3A1
H&K G3A2
H&K G3A3
H&K G3A3A1
H&K G3A4
H&K G3A4A1
H&K G3KA4
H&K G3KA4A1
H&K G3P3
H&K G3P4
H&K G3A5
H&K G3A6
H&K G3A7
H&K G3A7A1
H&K HSG1
H&K BA63
H&K G3S
H&K G3M-Tactical
H&K G3TGS
H&K G3A3ZF
H&K G3SG/1
H&K MSG3
H&K MSG90
H&K PSG1
H&K HK32

There are bores on the sides of the receiver that can be used for scope mounting purposes.

H&K G3 receiver, chambered for .308 Win.

Figure 2: The receiver of H&K G3, chambered for .308 Win. (Source: https://atlanticfirearms.com/ptr-gi-308-rifle-w-o-rail)

Scope Mounts Interchangeable With H&K G3

Rifles That Have One-Piece Scope Mounts Interchangeable With H&K G3

All the rifles listed in the category below have one-piece mounts interchangeable with H&K G3. For one-piece mounts to fit on a rifle, mounting surfaces on these rifles must match in every dimension. Rifles that meet such criteria are:

MKE T41
MKE T43
T93
H&K MP5
H&K HK33

Rifles That Have Two-Piece Scope Mounts Interchangeable With H&K G3

All the rifles listed in the category below have two-piece mounts interchangeable with H&K G3. To meet interchangeability conditions, two-piece mounts must match in all dimensions except the B distance. B distance can vary because two-piece mounts can be installed and adjusted closer or further apart. Such rifles are:

MKE T41
MKE T43
T93
H&K MP5
H&K HK33

Best Scope Mounts for H&K G3

Fixed Scope Mounts for H&K G3

This German-made MAKompetition scope mount offers expanded scope mounting options by converting the mounting surface to Picatinny. It is made of high-quality steel and comes with a thirty-year warranty.

Help Us Build Our Riflescope Mounts Database

If you happen to own this or any other rifle, we would appreciate it if you could help us expand our database by sending us some photos of the rifle receiver (the bare mounting surface of the rifle without the scope mounts installed). For your help, our company offers a fair return in terms of practical rewards.

Please send us an email for more information. You can contact us here: [email protected]

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Heckler & Koch G3

Sub Categories

The History of Heckler & Koch

H&K G3 Rifle Review

H&K G3 Calibers

H&K G3 Variants

Scope Mounts Interchangeable With H&K G3

Rifles That Have One-Piece Scope Mounts Interchangeable With H&K G3

Rifles That Have Two-Piece Scope Mounts Interchangeable With H&K G3

Best Scope Mounts for H&K G3

Fixed Scope Mounts for H&K G3

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