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| M67 grenade | |
|---|---|
| Name | M67 fragmentation grenade |
| Origin | United States |
| Type | Hand grenade |
| Service | 1968–present |
| Used by | United States Armed Forces; see United States Army; United States Marine Corps; allied forces |
| Wars | Vietnam War; Operation Desert Storm; Iraq War; War in Afghanistan (2001–2021) |
| Designer | Picatinny Arsenal (development oversight) |
| Design date | 1968 |
| Manufacturer | General Dynamics; Dayton T. Brown, Inc.; others |
| Production date | 1968–present |
| Weight | 14 oz (approx.) |
| Length | 2.5 in (approx.) |
| Diameter | 2.5 in (approx.) |
| Cartridge | Composition B |
| Caliber | fragmentation |
| Action | timed fuze |
| Filling | Composition B or Comp B |
| Filling weight | ~6.5 oz |
M67 grenade is a spherical United States military fragmentation hand grenade introduced in the late 1960s and used extensively by United States Armed Forces and many allied formations. It succeeded earlier designs and standardized a cast-iron fragmentation body, a pyrotechnic delay fuze, and a safety lever for infantry use. The M67 remains in service for its balance of lethality, handling, and integration with infantry doctrine in conflicts from Vietnam War to contemporary operations.
The M67 uses a grooved steel sphere cast to produce lethal fragments on detonation, with an outer protective finish applied during manufacturing at facilities such as General Dynamics and defense depots. Its fuze assembly derives from designs developed and tested at installations including Picatinny Arsenal and field-trialed in ranges associated with Aberdeen Proving Ground. The striker, spring, and safety clip integrate mechanical components similar to those used in earlier models tested at Edgewood Arsenal and follow procurement specifications issued by Department of Defense (United States). The body houses a centrally located Composition B charge, originally batch-tested under standards established by United States Army Materiel Command laboratories.
Standard issue M67 dimensions approximate a 2.5-inch diameter sphere with an overall weight near 14 ounces and an explosive fill of about 6.5 ounces of Composition B. The fuze provides a nominal delay of 4–5 seconds using a pyrotechnic train governed by specifications codified by United States Army ordnance branches. Fragmentation pattern, pre-deployment ballistic characteristics, and safety margins were characterized in trials at ranges associated with White Sands Missile Range and evaluated against casualty models used by US Army Medical Research and Development Command. Packaging and lot markings conform to logistics protocols from Defense Logistics Agency.
Employment procedures follow training doctrines promulgated by United States Marine Corps infantry manuals and United States Army Infantry School curricula: remove safety clip, depress safety lever, and throw to achieve standoff before detonation. Tactics include offensive and defensive grenadier roles integrated into squads and fireteams operating under doctrines developed during engagements such as Vietnam War jungle operations and urban engagements observed in Iraq War and Battle of Fallujah (2004). Use with auxiliary equipment, including fragmentation barriers and grenade launchers, interacts with rules of engagement and target discrimination policies overseen by Department of Defense (United States) legal advisors.
While the standard M67 form remained stable, specialty variants and modifications emerged in procurement cycles overseen by Defense Advanced Research Projects Agency testing and acquisition studies by Program Executive Office Soldier. These include inert training replicas used by United States Naval Academy and service academies, practice rounds with reduced-charge fuse assemblies for ranges at Fort Benning, and adapted munitions for close-quarters training conducted in facilities linked to National Guard Bureau. Non-standard field modifications have been documented in after-action reports from units in Iraq War and War in Afghanistan (2001–2021) theaters and were subject to safety reviews by Armed Forces Medical Examiner System investigators.
Production programs were contracted to defense manufacturers including General Dynamics under procurement orders issued by Defense Logistics Agency and coordinated via United States Army Materiel Command. Lot acceptance testing, Quality Assurance, and depot refurbishment cycles occurred at government depots and contractor facilities inspected by officials from Army Sustainment Command. Distribution followed supply-lines tied to Military Sealift Command and theater-level logistics hubs used in Operation Desert Storm and subsequent deployments. International sales and Foreign Military Sales were administered through Defense Security Cooperation Agency agreements with allied militaries.
The M67 first achieved widespread combat use during the latter stages of the Vietnam War, where infantry units from United States Army and United States Marine Corps formations relied on it for assault and bunker-clearing missions. It featured in major operations during Operation Desert Storm in 1991, urban clearing in Iraq War, and counterinsurgency operations during War in Afghanistan (2001–2021), appearing in after-action reviews filed with Joint Chiefs of Staff task forces. Doctrine integration, casualty effects, and employment patterns have been the subject of studies at institutions like RAND Corporation and Walter Reed Army Institute of Research.
Safety protocols for storage, carriage, and disposal are governed by regulations from Department of Defense (United States) ordnance manuals and enforced at unit levels by Explosive Ordnance Disposal teams and Ordnance Corps personnel. Training emphasizes handling drills codified at training centers such as Fort Bragg and Camp Lejeune, immediate action for misfires, and demilitarization procedures performed at certified facilities under oversight from Environmental Protection Agency coordination when applicable. Incident reporting follows channels through Inspector General of the Department of Defense and unit safety offices to mitigate risks and update technical bulletins.
Category:Hand grenades