your weapon has become a static mesh. your going to need to reimport it as a skeletal mesh.
Hello,
So I’m a beginner for UE4 and I am following a FPS tutorial:
The problem is, that at 5:42 the man opens the skeleton
Of the AK-47, but when I removed the collision for the weapon,
The Skeleton also dissapeared… And I never heard from it again…
I tried replacing the weapon model and resetting the workspace but nothing 
image?
Please help!
Huge thanks for the answer! :), but the thing is when it is a skeletal mesh and the collision is not removed, when I move forward, the character moves to the left at a really high speed.
Huge thanks dude! I rewatched the video and I saw that I had to check “import skeleton” 
Ur amazing! Stay awesome 