Army approves M111, first new lethal hand grenade since 1968

PICATINNY ARSENAL, N.J. - The U.S. Army has cleared the M111 Offensive Hand Grenade for full material release. Developed by the Capabilities Program Executive Ammunition and Energetics, CPE A&E, in conjunction with the U.S. Army Combat Capabilities Development Command Armaments Center at Picatinny Arsenal, the M111 OHG will replace the obsolete body and fuze of the Mk3A2 hand grenade series, marking the first new lethal hand grenade to achieve full material release since 1968 when the Mk3A2 entered service. The Mk3A2 is restricted for use due to its asbestos body, unlike the M111 which utilizes a plastic body that is fully consumed during detonation.

The M111 will provide increased training and operational readiness while providing the Soldier with a safer option. It also offers Soldiers the ability to fight more effectively in closed quarter urban environments by leveraging blast overpressure, BOP, instead of fragmentation to deliver lethality. When used in grenades, BOP delivers devastating effects to enemy personnel and equipment without fragmentation and is a potent tactical advantage in the field. The M67 fragmentation hand grenade projects lethal and incapacitating fragments that can be deflected when employed in enclosed, restricted terrain like buildings, rooms and structures, whereas the M111 OHG projects high BOP effects that are less affected by obstacles in enclosed and restricted terrain.

"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," explained Col. Vince Morris, Project Manager Close Combat Systems, CPE A&E. "But a grenade utilizing BOP can clear a room of enemy combatants quickly leaving nowhere to hide while ensuring the safety of friendly forces."

In open terrain, the Soldier will employ the M67 to maximize lethal fragment effects, whereas in enclosed and restricted terrain, Soldiers will employ the M111 to maximize BOP effects on the enemy.

"We've given our Soldiers and joint warfighters the flexibility to determine in the field which type of grenade will best suit the current situation they are facing, be it open space or confined area," explained Tiffany Cheng, one of the DEVCOM Armaments Center engineers that developed the M111 at Picatinny Arsenal.

Another major benefit of the new M111 design is standardization. The new grenade and its training version, the M112, leverage the same five-step arming process as the M67 and its training version, the M69, allowing Soldiers to train as they fight, improving combat performance and effectiveness. In addition, the M111 and M112 use the same fuzes as the M67 and M69 respectively, thereby enabling Army acquisition professionals to save costs by leveraging economies of scale made possible by common fuze production lines when sourcing both grenades. Both grenades also have government-owned intellectual property that enables the Army to effectively compete production contracts across the industrial base, enhancing production opportunities for multiple vendors while providing best value to our customers, the Soldiers and the taxpayer.

"By standardizing the arming process and the fuzing, the Army saves taxpayer money without sacrificing lethality on the battlefield," said Morris. "This is the kind of acquisition reform that is currently underway throughout the Army acquisition enterprise. We are taking advantage of that initiative to drive down costs while increasing combat effectiveness."