Ok to shoot if someone goes for your gun?

Hello all,So if I get into a physical altercation and we start wrestling around with someone and they see my gun ( I carry IWB 3 o’clock position) and try and take it from me, would I be justified in shooting them? I mean I don’t know what his intentions are if he were to get it. Thanks via /r/CCW http://bit.ly/2XovTbc