Yes , if he's still around. There was a fellow who made chamber inserts for single shot and double bbl. shotguns. I had him make a couple of 10ga to 12ga adaptors for me years ago to allow me to shoot std. 12ga flares out of one of these guns. He was kind enough to cut the 12ga chambers short so they would take the flares but not the shotgun hulls . I was woried about BATFE claiming " sawed off shotgun " .
Chris