Besides Spuhr and Eratec are there any other mounts that will work with the 5-20 ultra short?
Will the following work? Geissele 34mm Badger 34mm unimount
The ARC M10 QD-L just barely fits, maybe snugging into the first 1mm of the objective bell, I used it when I had my 5-20 US on my AR-6.5, I wish I took some pictures to show you, someone else on the Hide (maybe @Covertnoob5) had some pics a while back but I can't find them right now.
Are you looking for a mount in order to get a 20MOA cant or something like that? Another option would be the Badger 22MOA riser and then use regular rings...
I am not too worried about canted mounts as the max distance will probably never exceed 1000 yards with .308. Mostly research as I am thinking of getting an ultra short and wanted to know what mount options exist as I prefer one piece mounts vs rings.