 Nyorai mberi kweiyi ndima - M4 carbine yakagadzirwa kubva kune zvakasiyana-siyana zvekugadzirwa kwezvirongwa izvi, kusanganisira nhamba ye-barreled A1 carbines. XM4 Colt Model 720 yakatanga miedzo yayo muna 1984, ine dhiramu re. Chombo chacho chakava M4 muna 1991. Yakagamuchirwa zviri pamutemo sechinotsiva M3 Grease Gun uye Beretta M9 uye M16A2 yemauto akasarudzwa muna 1994, yakashandiswa nekubudirira kukuru muBalkan uye muhondo dzichangobva kuitika, kusanganisira Afghanistan neIraqmabhaisikopo. M4 carbine ine matatu-round burst firing mode, nepo M4A1 carbine ine fully automatic firing mode. Ose ane Picatinny njanji pamusoro mugamuchiri, kubvumira kutakura mubato neshure kuona gungano kuti kutsiviwa nevamwe vavariro mano. 