i have a mossberg 930 and a remington 1100 trap, both of which always go to the trap range with me.
the mossberg is the only one which keeps running reliably -- about 20k rounds through it now with few issues. wooden forend cracked and then blew up in the middle of a trap round. well, thats why i keep the remington as a backup gun. replaced the furniture with plastic. now its ugly tupperware but at least i won't worry about scratching it!
the remington sure looks pretty, even when it malfunctions -- which is often.
mossberg parts can be a pain to come by, but it can be done.