The M67 is a U.S.-origin 90 mm recoilless rifle built as a crew-served direct-fire weapon for infantry anti-armor, bunker, and antipersonnel missions. Its record spans Australian and U.S. service in Vietnam, U.S. reissue in Afghanistan, Argentine fielding in the Falklands War, South Korean KM67 production, and later 90-RR reporting in the 2017 Battle of Marawi.
A 107 Field Battery Association account of the Battle of Coral describes 1 RAR anti-armour troops directing fire from 90 mm M67 recoilless rifles with flechette ammunition to relieve pressure from attacking NVA troops; Small Arms Survey separately identifies the 90 mm M67 as a recoilless weapon that saw Vietnam War service.
American Rifleman identifies a U.S. 90 mm M67 recoilless rifle in a photograph of Argentine soldiers during the April 1982 occupation of the Falkland Islands; Small Arms Defense Journal separately states that Argentine units carried and used M67s during the confrontation, but detailed firing accounts remain source-limited.
DVIDS reporting from Paktika Province documented 4th Brigade Combat Team, 101st Airborne Division soldiers incorporating M67 90 mm recoilless rifles into squads in February 2011 for static-position defense, limited offensive ambush use, and low-collateral high-volume fire.
Role detailsInquirer reporting from Marawi identified 90 mm recoilless rifles, commonly called 90-RRs, among the antitank weapons used by IS-inspired fighters against Philippine armored vehicles; the source supports the 90 mm recoilless-rifle class, while M67/KM67 background sources identify the standard 90 mm recoilless-rifle family represented here.
The M67 is a direct-fire recoilless rifle built around fixed 90 mm cartridges and a manually operated breech, giving infantry units a reloadable weapon for armor, fortifications, and personnel targets when its backblast danger can be managed.
FM 23-11 describes ground firing from the bipod and monopod as the normal posture, with shoulder firing also possible.
The manual lists HEAT, target-practice, and APERS ammunition classes, with the APERS round using a higher listed muzzle velocity than the HEAT and TP rounds.
Rapid fire was limited to five rounds followed by a cooling period, while sustained fire was listed at one round per minute.
Published manual and ammunition-catalog sources identify the M67 as a fixed-cartridge 90 mm recoilless rifle with anti-armor, target-practice, antipersonnel, and South Korean high-explosive ammunition paths.
FM 23-11 lists HEAT M371E1 for the rifle, while Poongsan lists HEAT M371A1 with Recoilless Rifle M67 as the associated weapon.
FM 23-11 lists TP M371 as a target-practice cartridge ballistically matched to the HEAT round.
The manual describes the antipersonnel canister round as a close-in defense cartridge with a flechette payload.
Poongsan lists 90 mm HE K242 with Recoilless Rifle M67 as the weapon association and a 400 m effective range.
The core U.S. Army designation is M67; KM67 and EM-67 are foreign-production or foreign-service designations documented for South Korea and Greece respectively.
| Variant | Configuration | Designation notes |
|---|---|---|
| KM67 | South Korean production model | WeaponSystems.net identifies Kia Motors as the South Korean producer, and the Korea Defense Products Guide lists the KM67 as a 90 mm recoilless rifle with M67-family maximum range data. Sources: 90mm M67 Recoilless Rifle, Korea Defense Products Guide |
| EM-67 | Greek production designation | The same M67 family source lists Greece among M67 producers; the EM67 designation is retained as an unlinked same-family production designation. Sources: 90mm M67 Recoilless Rifle |
Background sources place M67 entry into service in 1959 as a platoon-level 90 mm recoilless rifle replacing earlier 3.5-inch rocket-launcher equipment in U.S. infantry use.
Sources: 90mm M67 Recoilless Rifle, FM 23-11 Chapter 1
FM 23-11 covered mechanical training, fire-control instruments, ammunition, crew drill, marksmanship, technique of fire, and instructor guidance for the 90 mm recoilless rifle, M67.
Sources: FM 23-11 Chapter 1
DVIDS reported that 4th Brigade Combat Team, 101st Airborne Division began incorporating M67 rifles into squads in Paktika Province for static-position defense and possible ambush use.
Sources: Currahees add to their weapons arsenal
Inquirer reporting on the 2017 Battle of Marawi identified 90 mm recoilless rifles, commonly called 90-RRs, among the antitank weapons used by IS-inspired fighters against Philippine armored vehicles.
Sources: Wood-reinforced vehicles foil Maute antitank weapons
