How do I get my LO to sleep unswaddled?

My LO is 4 months and we starting to learn to roll. Now he hasn’t done it himself yet but I’ve been trying to have him sleep without his swaddle for a few weeks. I have bought other sleep items like the halo and the sleeping baby. (He does not want anything to do with them) I’ve tried the one arm out. Uhg is there any tricks on having them out of the swaddle into a sleep sack easier. Or is the best way just straight up cold turkey.