The U.S. Army has added a new M111 offensive hand grenade to the kit after nearly 60 years, a blast-focused munition designed for confined, urban fights that reduces the risk of lethal fragmentation hitting friendly forces; this article explains what the M111 does, why it matters for close-quarters combat, how it differs from the long-serving M67, and what lessons from recent conflicts pushed the change.
Soldiers have long relied on fragmentation grenades like the M67 for clearing groups in open terrain, a tried-and-true tool that creates lethal shrapnel. The M67, introduced in 1968, is a round, baseball-sized grenade that spreads fragments to neutralize clustered targets, and many veterans remember the sharp report and the cloud of smoke that accompany its detonation. That approach works well when you can control the environment and keep friends and noncombatants safely out of range, but modern fights often don’t offer that luxury.
The new M111 Offensive Hand Grenade is a different animal, designed to create casualties through blast overpressure rather than fragmentation. The M111 resembles a small water bottle and uses a plastic body that is consumed by the explosion, meaning it does not turn into projected fragments. That design aims to reduce the chance of causing fratricide or collateral damage inside rooms, bunkers, and other enclosed spaces where fragments can bounce unpredictably.
The U.S. Army has approved the new M111 Offensive Hand Grenade, its first new offensive hand grenade since the now-retired Mk3A2 entered service in 1968.
The new M111 resembles a small water bottle rather than a traditional round grenade. It causes casualties through blast overpressure (BOE) and not fragmentation. In contrast to a frag grenade, the M111 has a plastic body that is consumed entirely by the explosion and does not turn into projected fragments. The M111 won’t replace the M67 – the Army’s current grenade, which was also introduced in 1968 – but supplement it. Specifically, the M67, which is a fragmentation grenade, will be used in open terrain, and the M111 in urban areas, bunkers, and similar confined spaces.
Urban combat drives different requirements. When fighters are separated by walls or in tight corridors, fragmentation can be downright dangerous to your own troops if those fragments deflect. A grenade that relies on blast overpressure can clear a room without peppering every surface and person with metal, giving teams more confidence when they have to stack up and push through buildings.
”One of the key lessons learned from the door-to-door urban fighting in Iraq was the M67 grenade wasn’t always the right tool for the job. The risk of fratricide on the other side of the wall was too high,” said Col. Vince Morris, Project Manager Close Combat Systems, Capabilities Program Executive Ammunition and Energetics. Fragmentation greatly risks harming friendly forces when used in closed spaces because a grenade’s fragments can be deflected by objects in the space, whereas BOE cannot. It is likely that future conflicts will include urban combat, and being able to clear a room effectively with a grenade will save soldiers’ lives.
“[…] a grenade utilizing [blast overpressure] can clear a room of enemy combatants quickly, leaving nowhere to hide while ensuring the safety of friendly forces,” Morris added.
Practical considerations drove the decision as much as theory. In close-quarters fights, every tool that reduces the chance of friendly casualties while still defeating an enemy is worth fielding. The M111 does not try to replace the M67; it complements it, giving teams a choice depending on terrain and the risk profile inside a structure.
Veterans know the tradeoffs: fragmentation hits hard and is deadly in the open, while blast overpressure is blunt but effective in tight spaces where fragments would ricochet. The Army’s move reflects lessons learned in recent campaigns and a recognition that future fighting will include cities and complex built environments where precision of effects matters as much as lethality.
Adopting the M111 also signals an emphasis on protecting friendly forces and minimizing unintended harm in populated areas. New gear that tilts the balance toward controlled outcomes aligns with a disciplined warfighting approach and helps small units operate with greater confidence during dangerous, close-in engagements.
Soldiers still need to train with both types of grenades so they can pick the right one for the fight; choosing the wrong munition at the wrong time can be costly. The M111 adds flexibility to platoon and squad-level options and represents a straightforward, modern answer to a classic problem in infantry tactics.
That said, the old rules remain: you still respect explosives, you still follow safety drills, and you remember the timeless warning that once the pin is pulled, the device is no longer your friend. New tools make a difference, but professionalism and training make those tools effective.
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