You might look at the extreme outer limits online store. Kifaru, is making a scabbard for them (also integrates with the nomad 2) .... I run the whole pack/scabbard system for predator hunting and have been very satisfied. Scabbard easily accommodates my LR rig with NF, bipod, 24” barrel and 7” suppressor. Horse packing is out of my realm of expertise, but I think the scabbard could work fine for that too.