I am thinking of a NF 50mm objective for my quad with a lilja barrel and was hoping someone had this combo and could tell me what size rings had worked for them.
Wish I could help answer, but I'll be in the same boat as you shortly but I thought I would help clearify your question so the answer will be the right one. I know there are a couple guys on here with that set up or pretty close to it.
On my Quad Trainer, I have a US Optics base (20moa) with low 30mm Seekins Rings running a 4-16x50 Nikon Tactical on a Manners T-4 stock. It works out perfect for me. Another option is an AI scope mount.
I would have measured but I don't have the rail in hand yet and if I had them on order at the same time I wouldn't have to wait as long to set this thing up.
I will measure when I get the rail and then just order the right rings and wait a little longer...
I swapped rings until the cows came home....DIP flat base and ended up with NF UL medium 30mm rings 1.00" tall.
The Badger standard height alloy rings worked with the stock barrel but not the new Rock barrel.
The scope is a Leupold 3.5-10 EFR with a 50mm objective.
I will try to get some photos up in the next day or two with the new Rock barrel.
I have been seasoning the barrel on whistle pigs