Who will win, an M4 carbine or an M16 carbine? - Quora
15-22 manual | Tacticool22
UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST) RIFLE, 5.56MM, M16A2 W/E, Carbine, 5.56MM, M4, Carbine, 5.56MM, M4a1, Plus 500 free US military manuals and US Army