美一線步兵換裝新口徑武器，6.8mm彈藥將更具殺傷力。美步兵班的武器裝備和人數變化歷程、以及未來15人班組是否會推廣。XM5/XM250/M-4/M-249/M-2

美國陸軍計畫在2023年初實裝6. 8釐米為主的「下一代班用武器計畫」（Next Generation Squad Weapon Program）武器（X）M5步槍和（X）M250輕機槍，預計2023年初將優先換發給第一線作戰的步兵單位，用以取代M4卡賓槍和M249班用自動武器（SAW），海軍陸戰隊（USMC）和特種作戰司令部（SOCOM）將選擇性地採用新口徑武器。此外，現有的武器平臺仍將繼續在全軍服役。
The U.S. Army plans to implement the 6.8cm-based "Next Generation Squad Weapon Program" (Next Generation Squad Weapon Program) weapons (X) M5 rifles and (X) M250 light machine guns in early 2023. Priority reissue to front-line combat infantry units to replace the M4 Carbine and the M249 Squad Automatic Weapon (SAW), the Marine Corps (USMC) and Special Operations Command (SOCOM) will selectively adopt the new caliber weapon . Additionally, existing weapons platforms will remain in service across the military.