I've had 5 Mark4's that I've used for hunting and competition (at Prov and National levels) and they have all been super for me. Never a doubt about anything failing or not returning to where they should be. That's why I keep using them. I would love dearly to buy a NightForce or US Optics or Schmidt and Bender, but with 2 kids in University, it ain't gonna happen.
So for the time being, it's gotta be Falcon Optics for me and my price point. In the meantime, my sniper rig, still wears a Mark4 M1 LR/T duplex 4.5 x 14 x 50mm... it's also my earthpig hunting rifle.
Peace be to journey,
Barney