Taking their shot: Airmen qualify on M4 Published Nov. 30, 2017 82nd Training Wing Public Affairs Staff Sgt. Joshua Stevenson, 82nd Security Forces Combat Arms Training and Maintenance instructor, demonstrates different hand grips while using the M4 with an M68 scope at Sheppard Air Force Base, Texas, Nov 28, 2017. The class is for Airmen to maintian their qualifications on the weapon. (U.S. Air Force photo by Alan R. Quevy).