Combat Arms Training and Maintenance (CATM), or simply Combat Arms are United States Air Force Security Forces personnel who train base populace on the use of small arms, oversee, maintain and repair all small arms in the U.S. Air Force inventory. AFSC 3P0X1B, SEI 312 (TSgt and above) are Security Forces personnel who completed the 10 week Combat Arms Apprentice Course (Lackland AFB) and conduct marksmanship training to prepare all Air Force personnel for home station and deployment operations. Combat Arms specialists lead, manage, supervise and implement small arms weapons training programs. Their duties include operating firing ranges and associated facilities, enforcing range safety, inspecting/repairing weaponry, performing preventative maintenance, developing/utilizing training aides and determining training/maintenance resource requirements. Combat Arms personnel also provide training in safeguarding weapons, ammunition and equipment; instructing small arms weapons qualification training and providing guidance on weapons placement to SF and other ground defense force commanders. Combat Arms Instructors are the Air Forces small arms weapons Subject Matter Experts (SME).