Only Armature is Animated

I'm trying to import a model with animation from Blender, and the model is a first person view of arms holding a gun for a first person shooter game. The gun has several parts that are animated without an armature, but the arms do use an armature. When I import it to Unity, only the arms are animated and the separate gun parts do not move. Is there an animation import setting that I need to enable to animate separate objects, or does it only import armature animation?