I can’t get my baby to sleep un-swaddled or in a crib

Hi Mommas! I have a five month old boy & he’s the cutest little guy. HOWEVER, the only way he’ll sleep at night is if he is tightly swaddled and rocking in his swing. I need help getting him to sleep un-swaddled and in his crib. The transition sacks won’t work because he HAS to have his arms tucked in tightly or else he’s awake every five minutes. Any suggestions? I could use all the help I can get…