The DNZ Products Browning Bar & Long Action BLR-Low Mount at the link below is a 1" diameter mount and should work with your BAR. However, I recommend contacting DNZ to confirm compatibility with your specific rifle.
Yes, all BAR actions use the same mount. So the DNZ Browning Bar Mount 30mm Scope Tube Mount will fit and function as intended with your Safari 308.
It would depend on the specific scope you are asking about. However, if you have a 30mm diameter scope with a 40mm objective lens then the medium DNZ Browning Bar Mount 30mm Scope Tube Mount should work.
The 4 Hole to hole spacing dimensions are .50″, 3.19″, .50″ for the DNZ Browning Bar Mount 30mm Scope Tube Mount.
These DNZ Browning Bar Mount 30mm Scope Tube Mounts will not work with that scope because these are 30mm diameter rings and you need 1 inch diameter rings for that scope. The DNZ Browning Bar Mounts you need can be found by clicking the link below. I recommend using the medium height rings.
https://www.opticsplanet.com/dnz-dednutz-browning-bar-1in-scope-mount.html?_iv_parent-gun-model=browning-bar
The DNZ Browning Bar Mount 30mm Scope Tube Mount that would work best for your setup is the low mount option. MPN:55500
These DNZ Browning Bar Mount 30mm Scope Tube Mounts are for Browning BAR rifles and will not work with a Marlin Rifle.
Yes, the high mount should fit that optic.
None of these will fit. You need the SKU: 18500 mount. Unfortunately, we do not carry that mount.
You need the High mount: DZ-MT-BRBAR-30-58500