Chain Gun An AH-64E Apache helicopter fires its M-230 chain gun during a combined arms live-fire exercise at Joint Base Lewis-McChord, Wash., April 5, 2016. Army photo by Capt. Brian H. Harris SHARE: Download: Full Size (0.64 MB) Tags: 2nd Infantry Division, Joint Base Lewis-McChord, AH-64E Apache Helicopters, Stryker Armor Combat Vehicle, CALFX, Soldiers Credit: Capt. Brian Harris VIRIN: 160405-A-PG801-001A.JPG Photo Gallery