The annual event tackles small unit, soldier combat problems.
The rifle is for scouts, engineers and infantry squads.
Magnet fishing duo reels in two sniper rifles.
The Army is slated to pick the actual weapon in the coming months.
The weapon can be chambered in three calibers.
Marines landing in Australia, Air Force Defenders in action, Army Strykers in Poland and more in this week's Frontline Photos.
A replacement for the U-28 Draco could be chosen as early as 2022.
By Valerie Insinna
Although Army officials knew the gun was unloaded, they said they recognize that others did not.
Marine infantry is getting a head-to-toe gear makeover.
Criminal investigators are looking into an M4 rifle that went missing after a training event.
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