I have an older "Flatback" action and a MDT/LSS chassis system.

I have the action in the chassis without a barrel(it's getting chopped)and am having a spacing issue. With the rear action screw tightened, when I raise the cock the action, it will not stay in firing mode. I raise the bolt, and when I lower it the bolt release goes back down and the trigger doesn't reset. The trigger is stock. Everything is pretty much stock... Except the stock.

Anyone have any ideas?