States , Weapons and Equipment Stryker Cavalry Regiment at 04:03 U.S. Army Pfc. Kevin B. Mettler (front), 22, and Pvt. Jason R. Pompa (rear), 26, mortar gunners for Mortar Platoon, L Troop of the 4th Squadron, 2nd Stryker Cavalry Regiment based in Vilseck, Germany , cover their ears as a long-range