This weekend I machined the scope rail and the upper half of the scope mount for my 8.6 BLK Mosin. It's all coming together! The next step is to actually rivet the scope rail to the receiver. I plan to machine the rivets myself from 347 stainless steel, which is an especially ductile stainless steel especially suitable for making rivets.
I built 40MOA into the scope rail, which should allow me to dial in subsonics out to about 750 yards or so. It's gonna be a blast running this thing. I'm not decided on optic though. I like the Leupold Mark 3 HD, but I'm open to any 1-4 or 1-6 LPVO that's has a relatively short OAL so that it won't look goofy on such a short gun. Sadly, IOR Valdada discontinued their Pitbull LPVOs years ago. I wish I had bought like three of them back when they were around.