I heard about that , but like i said , the Dreadnought wasn ' t on the map at that time . <| sep |> Looks like rumham ! <| sep |> The difference is quite more subtle than TGPig ' s reply might indicate . The m 4 a 1 s has a silencer , so your shots won ' t be heard from a long distance and they also won ' t have tracers useful to spray through a smoke and not have your position spotted , although rarely reeeally useful . Also , it shoots slower and has a slightly more packed bullet spread , making it more comfortable to control aaand has less bullets . The m 4 is , well , basically the opposite of all that . Loud , tracers , shoots faster , a bitty harder to control , more bullets . IMO , the m 4 a 1 s spray is actually harder to control , so you have to feel it for yourself