lol, cant help but noticing the sniper arguement..ill join in :)
air force uses the m107 (m82, but they like to call it something else, but i do think it is more anti-materiel than infantry) and m14
army uses m82, m40a3, and m24, and m14
marines use sr-25 (m110 (which is sorta like an m16 but chambered in a 7.62x54mm round instead) to the gun fanatics) and m14
navy uses m21 i think, idk, but it might be m14 ebr (m21 is more of a cod name, while there is an m21, it is really just a scoped m14)
correct me if im wrong
on topic, that gun is so sexy, i must have that gun!
G&G Combat Machine M4-Carbine
in soviet russia, algebra solves you!