Rifle Demo Army Staff Sgt. Martin Matteson, a team leader with C Troop, 5th Squadron, 1st Cavalry Regiment, provides an M4 carbine semi-automatic rifle demonstration during a weapons exchange at Ranikhet Cantonment, Uttarakhand, India, Sept. 19, 2014. SHARE IMAGE: Download Image: Full Size (0.41 MB) Tags: army, indo-pacific Photo By: Army Staff Sgt. Mylinda DuRousseau VIRIN: 140918-A-SF624-311.JPG Photo Gallery