Hi,
thanks for your support request.
Sure, you can animate any character, weapon, object that you like as long as it has bones and/or is made out of separate parts that you can move/animate. Here is a tutorial video where I'm showing how to do some basic FPS animations on a pistol: UMotion "In Practice" - Our First Animation (FPS)
Please let me know if you have any further questions.
Best regards,
Peter