Took this rig out to zero yesterday.
Was getting odd results, 1 moa lateral spread, and 4 moa vertical spread.
When I got home I went over it in detail and found my trouble. I had installed a YHM M-Lok front swivel in the bottom of the float tube. I didn't pay close attention and had inadvertently ran the M-Lok hard against the bottom of the gas block, pushing the top of the gas block into the top of the float tube.
Not a lot of clearance on these low profile tubes. I relocated the front swivel back a notch, and got off the gas block. Everything is floating again.
Will get back out and re-zero soon, and get some chrono numbers.
