Octane: "Yo, you got some great stuff in here, amigo!"
Caustic: "I am repurposing this equipment."
Wraith: "Mine now."
Gibraltar: "Look what I found! BWUWHAHAHA!"
Lifeline: "Looks betta on me!"
Mirage: "Might look like I'm stealing, but trust me, this is something totally different."
Wattson: Something French I guess, idk.
Revenant: "I'm looting your corpse."
Bloodhound: "You no longer need this."
Bangalore: "Commandeering here. It's when you take stuff from dead bodies you find on the battlefield."
Pathfinder: "Thank you for the gear, friend!"
Crypto: "Things only belong to those who can keep them."
Source: https://www.reddit.com/r/apexlegends/comments/fa14pv/legends_should_have_voice_lines_for_when_they/