American police officers carry a semi-automatic duty pistol on every shift, and most patrol cars also hold a semi-automatic rifle and often a shotgun locked in a mount up front. The exact models vary by agency, but the question of what guns police carry has a narrower answer today than it did twenty years ago: a 9mm handgun on the hip, an AR-15 style rifle in the cruiser, a 12-gauge shotgun for specific jobs, and a set of less-lethal tools on the belt alongside the gun.
The Duty Handgun
The sidearm is the one firearm every uniformed officer carries, all the time. Semi-automatic pistols replaced revolvers as the law enforcement standard in the 1980s and 1990s because they hold more rounds and reload faster. A revolver held five or six; a modern duty pistol holds 15 to 17 rounds of 9mm in a standard magazine, and some extended magazines push past 20.
Three pistol families cover most American police holsters.
- The Glock 17 and its compact sibling the Glock 19 dominate the market. The full-size 17 holds 17 rounds of 9mm and weighs just over 25 ounces empty; the 19 carries 15 rounds in a shorter frame favored by plainclothes officers and detectives. No other handgun comes close to Glock’s share of U.S. law enforcement.1GLOCK. G17 Gen5
- The SIG Sauer P320 uses a modular chassis that lets armorers swap grip sizes and barrel lengths on the same serialized frame. The platform won the U.S. Army’s Modular Handgun System contract as the M17 and M18 and has been picked up by federal, state, and local agencies.
- The Smith & Wesson M&P line was designed specifically for police work and competes with Glock on price and ergonomics. Several large agencies issue it as their standard sidearm.
The 9mm cartridge is now the dominant police caliber. Departments that moved to .40 S&W in the 1990s and 2000s have been switching back. The FBI’s training division found that modern 9mm duty loads match .40 S&W in wound effectiveness under identical testing while producing less recoil and allowing higher magazine capacity. Officers shoot faster and more accurately with 9mm, which matters because real-world hit rates during shootings hover around 20 to 30 percent. Some agencies still field .40 S&W or .45 ACP, but the trend is steady.
What’s Loaded in It
Almost every department issues hollow-point ammunition for duty carry. A full metal jacket round can pass straight through a person and keep going; a hollow point expands on impact, dumps its energy into the target, and is far less likely to exit and strike a bystander. Expansion also creates a larger wound channel, so each round is more effective at stopping a threat quickly.
Modern 9mm duty loads use bullets in the 124 to 147 grain range, engineered to expand even after passing through automotive glass or heavy clothing. Those newer projectile designs are the main reason 9mm has caught up to the larger calibers in terminal performance.
Holsters, Lights, and Optics
The duty pistol rides in a retention holster designed to keep someone else from taking it during a struggle. Most departments require at least a Level III holster, meaning the officer must defeat three separate locking devices to draw. The combination is typically an internal lock, a rotating hood, and friction fit. The draw becomes automatic with practice, but an unfamiliar hand cannot simply pull the gun free.
Weapon-mounted lights are nearly universal on duty pistols now. Officers work roughly two-thirds of their shifts in low or reduced light, and a light on the pistol’s accessory rail lets them identify a threat while keeping both hands on the gun. Departments that once prohibited lights on duty weapons increasingly require them.
Red dot sights on pistols are the newest shift. A 2025 survey of working officers found that 77 percent reported their agencies allow handgun optics on duty, and 76 percent of those officers were running one. A red dot lets the shooter focus on the target rather than the front sight, which translates to faster, more accurate shooting under stress.
Backup and Off-Duty Guns
Many officers carry a second, smaller handgun as a backup, usually on an ankle holster or concealed on the vest. Common choices include the Glock 43, SIG Sauer P365, and Smith & Wesson M&P Shield, all 9mm subcompacts. They hold fewer rounds than a duty pistol, typically 6 to 12 depending on the model and magazine, but they are small and light enough to carry for an entire shift. The backup is insurance if the primary gun malfunctions or is lost in a fight.
Off-duty carry across state lines is governed by the Law Enforcement Officers Safety Act. A qualified active-duty officer carrying agency-issued photo identification may carry a concealed firearm in any state, overriding local concealed-carry restrictions.2Office of the Law Revision Counsel. 18 USC 926B – Carrying of Concealed Firearms by Qualified Law Enforcement Officers The statute does not cover machine guns, silencers, or destructive devices, and private property owners can still prohibit firearms on their premises. The officer must also meet agency qualification standards and cannot be under disciplinary action that could cost them their police powers.
The Patrol Rifle
The 1997 North Hollywood bank shootout changed what rides in a patrol car. Two heavily armored robbers pinned down dozens of officers whose handguns and shotguns could not penetrate the suspects’ body armor. In the aftermath, departments across the country began issuing semi-automatic rifles to patrol officers, and the practice is now standard at most mid-size and large agencies.
The overwhelming majority of patrol rifles are built on the AR-15 platform and chambered in .223 Remington or its military equivalent, 5.56mm NATO. Compared to a handgun, a rifle offers dramatically better accuracy, effective range past 200 yards, and the ability to defeat soft body armor. The rifles are light enough to carry comfortably and short enough to maneuver through doorways.
Patrol rifles typically live in a locking mount inside the cruiser and come out only when the situation calls for more than a sidearm: an active shooter, a barricaded suspect, or any encounter where distance or barriers make a handgun inadequate. Optics have evolved from basic red dots toward low-power variable scopes that dial from 1x for close work up to 4x, 6x, or 8x for precision or for gathering visual information at distance.
The Shotgun’s Remaining Role
The 12-gauge pump-action shotgun was once the only long gun in a patrol car. Rifles have taken over that primary role at most agencies, but the shotgun keeps its spot because no other police firearm switches between lethal and less-lethal ammunition just by swapping shells.
With 00 buckshot, a 12-gauge is devastating at close range, with effective distance topping out around 50 yards for most shooters and about 70 yards for exceptional marksmen. Rifled slugs stretch that envelope to 100 to 150 yards in capable hands. That range gap is why patrol rifles supplanted shotguns for longer engagements.
Where the shotgun still earns its place is less-lethal deployment. Departments load dedicated shotguns with beanbag rounds, foam-tipped projectiles, or rubber slugs to give officers a force option between a Taser and a rifle. These less-lethal shotguns are marked with bright-colored stocks or tape so officers do not confuse them with their lethal counterparts. Shotguns are also the standard breaching tool, using frangible rounds that destroy a lock or hinge without sending a projectile down a hallway.
SWAT and Precision Rifles
Tactical teams carry equipment most patrol officers never touch. Their missions, including hostage rescues, high-risk warrant service, and barricaded armed suspects, shape the gun selection.
The short-barreled rifle, usually an AR-15 variant with a 10 to 11.5 inch barrel, is the workhorse of most tactical teams. It handles like a submachine gun in tight spaces but fires a rifle cartridge that performs far better against barriers and body armor. The Heckler & Koch MP5, a 9mm submachine gun that was standard tactical-team issue for decades, has largely been replaced by these short rifles, though some agencies still keep MP5s for specific roles.
Precision rifles let designated marksmen place a single shot at distances other firearms cannot reach reliably. The .308 Winchester has been the standard law enforcement sniper caliber for years, effective out to roughly 800 to 1,000 yards. The 6.5 Creedmoor is gaining ground for its flatter trajectory, less wind drift, and softer recoil, with effective ranges past 1,000 yards. Most actual police precision shots happen under 100 yards, so either caliber is more than adequate for the common case; the choice matters for the rare long shot.
Less-Lethal Weapons on the Belt
Firearms get the attention, but an officer’s duty belt holds several other force options that get used far more often. A Congressional Research Service analysis of federal survey data found that nearly all police agencies authorize some form of less-lethal weapon.3Congress.gov. Law Enforcement Use of Less-than-Lethal Weapons
- Conducted energy devices, commonly Tasers, are authorized by about 97 percent of local, county, and state agencies surveyed. A Taser delivers an electrical charge that causes temporary muscle contraction and incapacitates a person at close range.3Congress.gov. Law Enforcement Use of Less-than-Lethal Weapons
- OC spray, or pepper spray, is authorized by about 94 percent of agencies. It works through pain and temporary blindness and is used mainly in close one-on-one encounters.3Congress.gov. Law Enforcement Use of Less-than-Lethal Weapons
- Batons are authorized by about 89 percent of agencies, carried as a backup and deployed less often than Tasers or spray.
- Impact projectiles, typically beanbag rounds or rubber bullets fired from a dedicated shotgun, are authorized by roughly 73 percent of agencies.3Congress.gov. Law Enforcement Use of Less-than-Lethal Weapons
Together these tools give officers a spectrum of force below the firearm, and in practice a Taser or OC spray resolves the vast majority of physical confrontations officers face.
When Officers Can Actually Use These Guns
The legal standard governing every police firearm discharge in the United States comes from the Supreme Court’s 1989 decision in Graham v. Connor. Any claim of excessive force by a law enforcement officer is evaluated under the Fourth Amendment’s “objective reasonableness” standard, meaning a court asks whether a reasonable officer facing the same circumstances would have made the same decision, judged from the perspective of the officer on scene rather than in hindsight.4Library of Congress. Graham v. Connor et al., 490 U.S. 386 (1989)
In practice, officers are trained to use deadly force only when they reasonably believe a person poses an imminent threat of death or serious bodily harm to the officer or someone else. Every firearm discharge triggers an immediate administrative response: the officer reports to a supervisor, the weapon is preserved as evidence, and the incident goes through both criminal review and internal affairs. The officer is typically placed on administrative leave until those reviews finish. That process runs whether the shot hit anyone or not.