Concur with Topstrap44’s observation on the other attempts to copy the 7-2’s toggle bolt. I too have handled an original Summit, the Steyr variant as well as the new Volquartsen version of the Summit. None of them come close to the smooth action of a broken in 7-2. As with any receiver, if you have a new 7-2, the action will improve significantly as it wears in.
I went a different route with mine as a suppressor host. As for the cheek weld, not wanting to pay for and then have to adapt a biathlon stock to the 7-2’s curved trigger, I just fabricated my own from carbon fiber. This gave me the fit I wanted in the grip, butt and cheek. It’s still pretty much a prototype so it ain’t pretty, but it fits me and my desires.
Does pretty good at 100 yds and both the stock and action are tough as nails.
As for a scope mount, highly recommend getting a full length picatinny rail for it. Makes proper scope mounting so much easier. A good smith should be able to radius a section of rail and add any MOA you might want. Just make sure they add the receiver stud holes for a good lockup. PM me if you want info on a good smith in the northern VA area.
If you’re going to scope it, another handy mod is to mill a slot on the bottom of the receiver that allows the bolt pin to be removed from the bottom. Makes cleaning much easier as you don’t have to remove the scope each time you pull the bolt.
Another nice item is an improved toggle handle shaped to engage trigger finger and thumb easier. Check with some of the Biathlon shops for an old 7-4 handle and you might get lucky. I think I got one of the last ones from Larsen a few years ago, but hopefully they got more in stock. A few on the forum here have made their own that look really nice.
Sorry to be all over the map but it’s always nice when someone realizes how much of a gem these rifles can be.