I lost the copy of my will. How do I attain a copy for myself?

I made a will when I was suppose to be deployed and I somehow lost the will itself in the shuffle of being sent home early. I would like to have one on hand and one to give to my sister since she is my full beneficiary both for my last will and testament and is also my power of attorney under my living will. I just need to know how to track it down so others in my family can't fight her on my wishes that myself and I understand.