Sniper rifle in the context of M40 rifle

The militarization of police (paramilitarization of police in some media) is the use of military equipment and tactics by law enforcement officers. This includes the use of armored personnel carriers (APCs), assault rifles, submachine guns, flashbang grenades, sniper rifles, and SWAT (special weapons and tactics) teams. The militarization of law enforcement is also associated with intelligence agency–style information gathering aimed at the public and political activists and with a more aggressive style of law enforcement. Criminal justice professor Peter Kraska has defined militarization of police as "the process whereby civilian police increasingly draw from, and pattern themselves around, the tenets of militarism and the military model".

Observers have noted the militarizing of the policing of protests. Since the 1970s, riot police have fired at protesters using guns with rubber bullets or plastic bullets. Tear gas, which was developed by the United States Army for riot control in 1919, is still widely used against protesters. The use of tear gas in warfare is prohibited by various international treaties that most states have signed; however, its law enforcement or military use for domestic or non-combat situations is permitted.

A SWAT (Special Weapons and Tactics) team is a generic term for a police tactical unit within the United States, though the term has also been used by other nations.

SWAT units are generally trained, equipped, and deployed to resolve "high-risk situations", often those regular police units are not trained or equipped to handle, such as shootouts, standoffs, raids, hostage-takings, and terrorism. SWAT units are equipped with specialized weapons and equipment not normally issued to regular police units, such as automatic firearms, high-caliber sniper rifles, stun grenades, body armor, ballistic shields, night-vision devices, and armored vehicles, among others. SWAT units are often trained in special tactics such as close-quarters combat, door breaching, crisis negotiation, and de-escalation.

Counter-sniper tactics are military tactics and countermeasures used to avoid, neutralize, or reduce the effectiveness of hostile snipers.

A sniper is a military or paramilitary marksman who engages targets from positions of concealment or at distances exceeding the target's detection capabilities. Snipers generally have specialized training and are equipped with telescopic sights. Modern snipers use high-precision rifles and high-magnification optics. They often also serve as scouts or observers feeding tactical information back to their units or command headquarters.

In addition to long-range and high-grade marksmanship, military snipers are trained in a variety of special operation techniques: detection, stalking, target range estimation methods, camouflage, tracking, bushcraft, field craft, infiltration, special reconnaissance and observation, surveillance and target acquisition. Snipers need to have complete control of their bodies and senses in order to be effective. They also need to have the skill set to use data from their scope and monitors to adjust their aim to hit targets that are extremely far away. In training, snipers are given charts to ensure they can make last-minute calculations in the field.

A marksman is a person who is skilled in precision shooting. In modern military usage this typically refers to the use of projectile weapons such as an accurized scoped long gun such as designated marksman rifle (or a sniper rifle) to shoot at high-value targets at longer-than-usual ranges.

The proficiency in precision shooting is known as a shooter's marksmanship, which can be used to describe both gunnery and archery.

Small arms and light weapons (SALW), in arms control protocols, are two main classes of man-portable weapons.

Small arms, broadly speaking, are individual-service (i.e. for carry and operation by individual infantrymen) kinetic projectile firearms. These include: handguns (revolvers, pistols, derringers, and machine pistols), muskets, rifled muskets, shotguns, rifles (assault rifles, battle rifles, carbines, designated marksman rifles, short-barreled rifles, sniper rifles, etc.), submachine guns, personal defense weapons, squad automatic weapons, and light machine guns.

A varmint rifle or varminter is a type of small-caliber, precision-oriented long gun (firearm or high-powered airgun) primarily used for varmint hunting and pest control. Such rifles are typically characterized by sniper rifle-like designs such as heavy free-floating barrel, enhanced bedding, ergonomic gunstock, the use of bipod/beanbag and high-power telescopic sight, and the choice of high-muzzle velocity, high-ballistic coefficient munitions, which are all accurizing features needed for improving repeated shooting, often over long distances.

Both varmint hunting (which eliminates harassing outdoor nuisance animals collectively called varmints) and pest control (which removes infestations of destructive, often indoor pests) typically target animals that are difficult to eradicate by conventional hunting techniques due to their sheer numbers, burrowing or escape behaviors, camouflaging and defilading by the surroundings, or long alert distances that prevent easy approach or detection. These target animals typically come in three groups:

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.

The M14 rifle, officially the United States Rifle, Caliber 7.62 mm, M14, is an American battle rifle chambered for the 7.62×51mm NATO cartridge. It became the standard-issue rifle for the U.S. military in 1957, replacing the M1 Garand rifle in service with the U.S. Army by 1958 and the U.S. Marine Corps by 1965; deliveries of service rifles to the U.S. Army began in 1959. The M14 was used by the U.S. Army, Navy, and Marine Corps for Basic and Advanced Individual Training from the mid-1960s to the early 1970s.

The M14 was the last American battle rifle issued in quantity to U.S. military personnel. In 1967, it was officially replaced by the M16 assault rifle, a lighter weapon with a smaller 5.56×45mm intermediate cartridge. The M14 rifle remains in limited service across all branches of the U.S. military, with variants used as sniper and designated marksman rifles, accurized competition weapons, and ceremonial weapons by honor guards, color guards, drill teams, and ceremonial guards. Civilian semi-automatic variants are used for hunting, target shooting, and shooting competitions.

"Swedish Mausers" are a family of bolt-action rifles based on an improved variant of Mauser's earlier Model 1893, but using the 6.5×55mm Swedish cartridge, and incorporating unique design elements as requested by Sweden. These are the m/94 (Model 1894) carbine, m/96 (Model 1896) long rifle, m/38 (Model 1938) short rifle and m/41 (Model 1941) sniper rifle. Production began in 1898 at Carl Gustafs stads Gevärsfaktori in Eskilstuna, Sweden.

All Swedish Mausers other than trials rifles were chambered for the 6.5×55mm Swedish cartridge, and all Swedish-made actions were proof-tested with a single 6.5×55mm proof round developing approximately 455 MPa (65,992 psi) piezo pressure (55,000 CUP). Swedish Mausers were manufactured by Waffenfabrik Mauser AG in Oberndorf a/N in Germany and in Sweden by Carl Gustafs Stads Gevärsfaktori and Husqvarna Vapenfabriks Aktiebolag. All Swedish Mausers, whether built in Germany or Sweden, were fabricated using a Swedish-supplied high grade tool steel alloyed with nickel, copper, and vanadium, a product then noted for its strength and corrosion resistance.

The SVD (СВД; Russian: снайперская винтовка Драгунова, romanized: snayperskaya vintovka Dragunova, lit. 'Dragunov sniper rifle'), GRAU index 6V1, is a semi-automatic designated marksman rifle/sniper rifle chambered in the 7.62×54mmR cartridge, developed in the Soviet Union.

The M24 Sniper Weapon System (SWS) or M24 is the military and police version of the Remington Model 700 rifle, M24 being the model name assigned by the United States Army after adoption as their standard sniper rifle in 1988. The M24 is referred to as a "weapon system" because it consists of not only a rifle, but also a detachable telescopic sight and other accessories.

The M24 SWS has the "long action" bolt version of the Remington 700 receiver but is chambered for the 7.62×51mm NATO "short action" cartridge that has an overall length of 2.750 inches (69.85 mm). The "long action" allows the rifle to be re-configured for dimensionally larger cartridges up to 3.340 inches (84.84 mm) in overall length.

The Accuracy International Arctic Warfare rifle is a bolt-action sniper rifle designed and manufactured by the British company Accuracy International. It has proved popular as a civilian, police, and military rifle since its introduction in the 1980s. The rifles have features that improve performance in extremely cold conditions (which gave the rifle its name) without impairing operation in less extreme conditions.

Arctic Warfare rifles are generally fitted with a Schmidt & Bender Police & Military II (PM II) telescopic sight with fixed or variable magnification. Variable telescopic sights can be used if the operator wants more flexibility to shoot at varying ranges, or when a wide field of view is required. Accuracy International actively promotes fitting the German-made Schmidt & Bender PM II product line as sighting components on their rifles, which is rare for a rifle manufacturer. The German and Russian forces preferred a telescopic sight made by Zeiss over Accuracy International's recommendation.

The M110 Semi Automatic Sniper System (M110 SASS) is an American semi-automatic sniper rifle that is chambered for the 7.62×51mm NATO round. It is manufactured by Knight's Armament Company, developed from the Knight's Armament Company SR-25, and adopted by the U.S. military following the 2005 US Army Semi-Automatic Sniper Rifle (XM110 SASR) competition.

The M110 is to be replaced by the lighter and more compact M110A1 CSASS, which is developed from the G28, a variant of the Heckler & Koch HK417; however, most M110A1 models fielded have been of the SDMR variant. In 2021, a newer variant, the M110A2, was showcased and seen in use in early 2022.

A designated marksman rifle (DMR) is a modern scoped high-precision rifle used by infantry in the designated marksman (DM) role. It generally fills the engagement range gap between a service rifle and a dedicated sniper rifle, at around 300–600 metres (330–660 yd).

DMRs are distinguished from sniper rifles in that they are semi-automatic to provide higher rates of fire (with some also having selective fire to switch to burst or automatic) and have larger magazine capacities (10, 20, or 30 rounds depending on the firearm and operational requirements) to allow rapid engagement of multiple targets.