I am a Boarding Officer (Step up from BTM).....Legally, I can make arrests (though we Never do, just detain people for the local cops) searches all that good stuff.....As far as status as a Fed....I think it's a grey area. Depending on what I am doing I can act in the capacity of a Border Control agent, I have Customs authority, and our main authority of "enforcing all applicable laws and federal regulations"
As far as off duty I have the FL CWL, so I carry off base.