Arms importing wrongly to unity3d

When I import my FPS arms+weapon from blender to unity(I positioned as I wanted in blender using armature and pose mode(also I added some animations)), but when viewed in unity the arms are in the wrong position, and the animation is not as it should be(arms are in forward and different rotation in blender, but in unity they face up like if the armature positioning in blender does not work or import correctly).