Player+Weapon Animating

I want my weapons be affeted by the player movement animations, so i dont have to animate weapons separately, move in x by player running, move in y by his breathing and move in z at shooting in first person setting the EyeOffset to 0, is it possible to transfer an animation to a mounted object?, i've seen them somewhere but looks like some of those animations were disabled in first person view(for example moving weapon when player was running)?
Thanks.