M18 Pistol Advanced Marksmanship Training - U.S. Marine Corps Maj. Eric Antonelli, commanding officer for Range Company, Weapons and Field Training Battalion, Marine Corps Recruit Depot San Diego adjusts a student’s grip during an advanced marksmanship training course (AMT) at Camp Pendleton, California, April 14, 2022. Marines were invited to Edson Range to advance their knowledge in the M18 service pistol. (U.S. Marine Corps photo by Cpl. Anthony D. Pio)