Service rifle in the context of "M14 rifle"

The Heckler & Koch G3 (German: Gewehr 3) is a select-fire battle rifle chambered in 7.62×51mm NATO developed in the 1950s by the German firearms manufacturer Heckler & Koch, in collaboration with the Spanish state-owned firearms manufacturer CETME. The G3 was the service rifle of the German Bundeswehr until it was replaced by the Heckler & Koch G36 in the 1990s, and was adopted into service with numerous other countries.

The G3 has been exported to over 70 countries and manufactured under license in at least 15 countries. Over 7.8 million G3s have been produced. Its modular design was used for several other HK firearm models, including the HK21, MP5, HK33, PSG1, and G41.

An assault rifle is a select fire rifle that uses an intermediate-rifle cartridge and a detachable magazine. Assault rifles were first put into mass production and accepted into widespread service during World War II. The first assault rifle to see major usage was the German StG 44, a development of the earlier Mkb 42. While immediately after World War II, NATO countries were equipped with battle rifles, the development of the M16 rifle during the Vietnam War prompted the adoption of assault rifles by the rest of NATO. By the end of the 20th century, assault rifles had become the standard weapon in most of the world's armies, replacing full-powered rifles and submachine guns in most roles. The two most successful modern assault rifles are the AK-47 and the M16 designs and their derivatives.

A battle rifle is a service rifle chambered to fire a fully powered cartridge.

The term "battle rifle" is a retronym created largely out of a need to differentiate automatic rifles chambered for fully powered cartridges from automatic rifles chambered for intermediate cartridges, which were later categorized as assault rifles. Battle rifles were most prominent from the 1940s to the 1970s, when they were used as service rifles. While modern battle rifles largely resemble modern assault rifle designs, which replaced battle rifles in most roles, the term may also describe older military full-power semi-automatic rifles such as the M1 Garand, SVT-40, Gewehr 41, Gewehr 43, Type 4, FN Model 1949, and MAS-49.

Heckler & Koch GmbH (HK or H&K; German pronunciation: [ˌhɛklɐ ʔʊnt ˈkɔx]) is a German firearms manufacturer that produces handguns, rifles, submachine guns, and grenade launchers. The company is located in Oberndorf am Neckar and also has subsidiaries in the United Kingdom, France, and the United States.

Heckler & Koch was founded in 1949 by former Mauser engineers Edmund Heckler, Theodor Koch, and Alex Seidel, who founded the company out of the shuttered Mauser factory in Oberndorf. The company initially produced machine tool and metal parts until 1956 when, in response to a Bundeswehr contract for a new service rifle, HK developed the Heckler & Koch G3. The success of the G3 rifle prompted HK to transition to the defense industry. HK was owned by Royal Ordnance from 1991 to 2002, and is currently part of the Heckler & Koch Group, comprising Heckler & Koch GmbH, Heckler & Koch Defense, NSAF Ltd., and Heckler & Koch France SAS. The company's motto is "Keine Kompromisse" (No Compromises).

A fully powered cartridge, also called full-power cartridge or full-size cartridge, is an umbrella term describing any rifle cartridge that emphasizes ballistics performance and single-shot accuracy, with little or no concern to its weight or recoil. The term generally refers to traditional cartridges used in machine guns, bolt action and semi-automatic service rifles and select fire battle rifles prior to, during and immediately after the World Wars and into the early Cold War era, and was a retronym originally made to differentiate from intermediate-power rifle cartridges that gained widespread adoption into military service after World War II.

Full-power cartridges often have a caliber comparable to or greater than 7.5 mm (0.30 in) and a maximum effective range of at least 800 m (870 yd), and are intended for engaging targets beyond 300 m (330 yd). However, cartridges with calibers as narrow as 6.5 mm (0.26 in) have been described as being a full-power rifle cartridge. According the cartridge's overall length (COL), full-power cartridges can be grouped into long-action or "standard-action" cartridges, which are traditional cartridges (exemplified by the .30-06 Springfield, 8mm Mauser and 7.62×54mmR) with a COL between 72 and 85 mm (2.8 and 3.3 in); and short-action cartridges (such as the .308 Winchester and 6.5mm Creedmoor), which have a COL between 57 and 72 mm (2.2 and 2.8 in) and largely replaced long-action cartridges as battle rifle service ammunitions since the Cold War. Cartridges with a COL above 85mm are often however considered magnum cartridges instead of "full-powered".

Gun laws and policies, collectively referred to as firearms regulation or gun control, regulate the manufacture, sale, transfer, possession, modification, and use of small arms by civilians. Laws of some countries may afford civilians a right to keep and bear arms, and have more liberal gun laws than neighboring jurisdictions. Gun control typically restricts access to certain categories of firearms and limits the categories of persons who may be granted permission to access firearms. There may be separate licenses for hunting, sport shooting, self-defense, collecting, and concealed carry, each with different sets of requirements, privileges, and responsibilities.

Gun laws are usually justified by a legislature's intent to curb the usage of small arms in crime, and to this end they frequently target types of arms identified in crimes and shootings, such as handguns and other types of concealable firearms. Semi-automatic rifle designs which are derived from service rifles, sometimes colloquially referred to as assault rifles, often face additional scrutiny from lawmakers. Persons restricted from legal access to firearms may include those below a certain age or those with a criminal record. Firearms licenses to purchase or possess may be denied to those defined as most at risk of harming or murdering themselves or others, persons with a history of domestic violence, alcohol use disorder or substance use disorder, mental illness, depression, or those who have attempted suicide. Those applying for a firearm license may need to demonstrate competence by completing a gun safety course and/or show provisions for a secure location to store weapons.

The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is an assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle. The M4 is extensively used by the US military, which decided to largely replace the M16 rifle in US Army (starting 2010) and US Marine Corps (starting 2016) combat units as the primary infantry weapon and service rifle. The M4 has been adopted by over 60 countries worldwide, and has been described as "one of the defining firearms of the 21st century".

Since its adoption in 1994, the M4 has undergone over 90 modifications to improve the weapon's adaptability, ergonomics and modularity, including: the M4A1, which possesses a thicker barrel and a replacement of the burst-fire control group with a fully automatic one; the SOPMOD, an accessory kit containing optical attachments; and the underbarrel weapons such as M203 and M320 grenade launchers to the Masterkey and M26-MASS shotguns.

The M1903 Springfield, officially the U.S. Rifle, Caliber .30, M1903, is an American five-round, non-removable, staggered-row box magazine-fed, bolt-action, repeating service rifle, used primarily during the first half of the 20th century.

The M1903 was first used in combat during the Philippine-American War and was officially adopted by the United States as the standard infantry rifle on 19 June 1903. It saw service in World War I and was replaced by the faster-firing semi-automatic eight-round M1 Garand starting in 1936. However, the M1903 remained a standard-issue infantry rifle during World War II, since the U.S. entered the war without sufficient M1 rifles to arm all troops. It also was used as a sniper rifle during World War II, the Korean War, and the Vietnam War. It remains popular as a civilian firearm, collector's piece, a competitive shooting rifle, and as a military drill rifle.