With a Widened / Strengthened rear rack @Jts45acp in FL used to carry his weapon in a Kolpin case and a 70lb Labrador.I have 3 or 4 of those Kolpin Cases. I have the Mounting kit(s) to mount them on a Toro Twister/Mid-Duty Workman (I worked on and for Toro for awhile) that I was thinking of a way to mount on my Bike. I can't think of a way to make those kits work. It would be nice to have a rifle in a hard case if needed. It would be nice for an option on those remote trips.