This list contains weapons that are classified as crew-served, as the term is used in the United States military.

While the general understanding is that crew-served weapons require more than one person to operate them, there are important exceptions in the case of both squad automatic weapons (SAW) and sniper rifles. Within the table of organization and equipment for both the United States Army and the U.S. Marine Corps, these two classes of weapons are understood to be crew-served, as the operator of the weapon has an assistant, who carries additional ammunition and associated equipment, acts as a spotter, and is also fully qualified in the operation of the weapon.

Light and medium machine guns

In active service

General purpose machine guns

  • M240B/M240E4 (7.62×51mm NATO)
  • M240G (7.62×51mm NATO) (USMC)

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File:M240B Medium Machine Gun (7414626696).jpg|M240B

Image:M240G-0167-2004-01.jpg|Marines with a tripod-mounted M240G

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In active service (some branches, secondary or limited roles)

General purpose machine guns

  • M240D/M240E1 and M240H/M240E5 (Vehicle Mountable) (7.62×51mm NATO)
  • M60E3 (7.62×51mm NATO) (USN SEALs)
  • M60E4/Mk 43 Mod 0/1 (7.62×51mm NATO) (USN)
  • Mk 48 Mod 0/1 (7.62×51mm NATO) (USSOCOM)
  • MG 338 (.338 Norma Magnum) (USSOCOM)

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File:USMC-120427-M-SR181-035.jpg|M27 IAR (Infantry Automatic Rifle)

File:PEO M240L MG Telescoping Stock Right Side.jpg|M240L/M240E6

File:M60 machine gun DN-ST-88-00621.jpg|Navy SEAL fires an M60E3 from the shoulder

File:M60iraq2003.jpg|M60E4/Mk 43 Mod 0/1

File:U.S. Army Ranger, 2nd Battalion, 75th Ranger Regiment providing Overwatch in Iraq 2006.jpg|U.S. Army Ranger equipped with a Mk 46 Mod 1

File:Mk 48 PEO Soldier.jpg|Mk 48

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Out of service

  • HK21 (7.62×51mm NATO, Delta Force, Combat Controllers(CCT) and SEALs only)
  • XM8 LMG (5.56×45mm NATO)
  • EX 27 Mod 0 (Colt CMG-2; 5.56×45mm)
  • WAK 'Interim SAW (5.56×45mm)
  • XM106 (5.56×45mm)
  • XM262 (HK 21E variant, pre-HK 23E; 5.56×45mm)
  • XM234 (6×45mm, 5.56×45mm)
  • XM233 (6×45mm)
  • XM235/XM248 (6×45mm, 5.56×45mm)
  • XM223
  • CAR-15 HBAR (M1 and M2, 5.56×45mm)
  • T161 (7.62×51mm NATO)
  • T52 (7.62×51mm NATO)
  • T44 (.30-06)
  • T24 (.30-06)
  • T10/T23 (.30-06)
  • M1918A1/A2 BAR (.30-06)
  • M1922 BAR (.30-06)
  • Johnson M1941 LMG (.30-06, Rangers and Special Operations Forces only)
  • M14A1 (7.62×51mm NATO)
  • M15 (7.62×51mm NATO)
  • M16A1 with bipod (5.56×45mm NATO)
  • XM207/E1/Mk 23 Mod 0 (Stoner 63A1 'Commando'; 5.56×45mm NATO)
  • M1919A6 (.30-06)
  • Lewis Gun (.30-06, Army only)
  • Chauchat (.30-06, 8&nbsp;mm Lebel)
  • M1909 Benét–Mercié (Machine Rifle, (.30-06))

Experimental

  • Mk48 Mod 2
  • AAI Corporation LSAT (Lightweight Small Arms Technologies) LMG (5.56&nbsp;mm Composite-cased, Telescoping Ammunition)
  • Knight's Armament Company LAMG
  • FN EVOLYS
  • Sig Sauer MG 6.8 (SiG 6.8&nbsp;mm Fury hybrid round)
  • General Dynamics RM277 (True Velocity .277 TVCM polimer cased round)
  • Next Generation Squad Weapon - Automatic Rifle
  • Lightweight Medium Machine Gun (Medium Machine Gun) (.338 Norma Magnum)

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File:LSAT LMG used by an US Army soldier.jpg|LSAT LMG

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Sniper and anti-materiel rifles

In active service (some branches, secondary or limited roles)

Bolt action sniper rifle

  • M40A3/A5 (7.62×51mm NATO) (USMC)
  • M2010 ESR (Enhanced Sniper Rifle) (.300 Winchester Magnum) (US Army)
  • Mk 13 Mod 5 AWM (Arctic Warfare Magnum) (.300 Winchester Magnum)
  • Mk 21 Mod 0 PSR (Precision Sniper Rifle) (USSOCOM)
  • Mk 22 ASR (Advanced Sniper Rifle) (USSOCOM)

Semi-automatic sniper rifle

  • Mk 11 Mod 0/1/2 SWS (Sniper Weapon System) (7.62×51mm NATO)
  • M110 SASS (Semi-Automatic Sniper System) (7.62×51mm NATO)
  • Mk 14 Mod 0/1 EBR (Enhanced Battle Rifle) (7.62×51mm NATO) (USN SEALs, US Army and USCG)
  • M110A1 CSASS (Compact Semi-Automatic Sniper System) (7.62×51 NATO, 6.5 Creedmoore) (US Army, USMC)
  • M110K1 SASS (7.62×51 NATO, 6.5 Creedmoore) (US Navy Designated Marksman)
  • Mk 20 Mod 0 SSR (Sniper Support Rifle) (7.62×51mm NATO, 6.5 Creedmoor) (USSOCOM)
  • M14 Tactical Rifle (7.62×51mm NATO) (USCG)

Anti-materiel rifle

  • M82A1M/A3 (Anti-Materiel rifle) (.50 BMG)
  • M107 (Anti-Materiel rifle) (.50 BMG)
  • Mk 15 Mod 0 LRSW (Long-Range Sniper Weapon) (Bolt Action Anti-Materiel Rifle) (.50 BMG) (USN SEALs)

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Image:SquadDesignatedMarksmen.jpg|Soldiers with SDMRs

File:EMR.png|M39 EMR (Enhanced Marksman Rifle)

File:M-40A3.jpg|M40A3

File:M107 1.jpg|M107

File:M110 ECP Right Bipod.jpg|M110 SASS (Semi-Automatic Sniper System)

File:SR-25 pic02.jpg|Mk 11

File:SPRCrane.jpg|Mk 12 Mod 0 SPR (Special Purpose Rifle)

File:Mk.13 MOD 5 sniper rifle.jpg|Mk 13 Mod 5 AWM (Arctic Warfare Magnum)

File:PEO M14 EBR.jpg|Mk 14 Mod 0 EBR (Enhanced Battle Rifle)

Image:Tac50.jpg|Mk 15 Mod 0 LRSW (long-range sniper weapon)

File:XM2010 November 2010.jpg|XM2010 ESR (Enhanced Sniper Rifle)

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Out of service

Semi-automatic sniper rifles

  • Mk 11 Mod 1 (Semi-Automatic Sniper Rifle) (7.62×51mm NATO)
  • EX 17 Mod 0 SCAR-H (SV) (Semi-Automatic Rifle) (7.62×51mm NATO)
  • M21 Sniper Weapon System (Semi-Automatic Sniper Rifle) (7.62×51mm NATO)
  • M25 Sniper Weapon System (Semi-Automatic Sniper Rifle) (7.62×51mm NATO)

Bolt action sniper rifles

  • M24 Sniper Weapon System (Bolt Action Sniper Rifle) (7.62×51mm NATO)
  • M40 (Bolt Action Sniper Rifle) (7.62×51mm NATO)
  • M40A1 (Bolt Action Sniper Rifle) (7.62×51mm NATO)
  • M86 (USN SEALs)
  • M1903A4 (Bolt Action Sniper Rifle) (.30-06)
  • Winchester Model 70 (Bolt-Action Rifle) (.30-06)

Anti-materiel rifle

  • M82A1/A1A (Semi-Automatic Anti-Materiel Rifle) (.50 BMG)
  • M82A2 (Semi-Automatic Anti-Materiel Rifle) (.50 BMG)
  • Robar RC-50 (Bolt-Action Anti-Materiel Rifle) (.50 BMG)

Experimental

  • XM109 (Semi-Automatic Anti-materiel rifle) (25×59&nbsp;mm)
  • XM500 (Bullpup Semi-Automatic Anti-materiel rifle ) (.50 BMG)

Machine guns, automatic grenade launchers, and automatic cannons

In active service

Light machine guns

  • M249 Family (Light Machine Gun) (5.56×45mm NATO)

Medium machine guns

  • M60 Family (Medium Machine Gun) (7.62×51mm NATO)
  • M240 Family (Medium Machine Gun) (7.62×51mm NATO)
  • M134D/GAU-17/A (Rotary-Barreled Medium Machine Gun) (7.62×51mm NATO)
  • MG 338 (Medium Machine Gun) (.338 Norma Magnum) (USSOCOM)