Airman 1st Class Riley LaGrassa, a 28th Logistics Readiness Squadron inspection technician and Senior Airman Andrew Uttech, the 28th Security Forces Squadron armory assistance noncommissioned officer in charge, verify M4A1 Carbine rifle serial numbers on Ellsworth Air Force Base, S.D., June 28, 2021. The M4A1 provides several upgrades such as utilizing ambidextrous safety and safe, semi and automatic trigger groups. (U.S. Air Force photo by Airman 1st Class Quentin K. Marx)

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Tags: M4A1 rifle
Photo by: Airman 1st Class Quentin Marx |  VIRIN: 210628-F-YM413-061.JPG