just got the 556 version this week,place a leupold target scope on it with good rings,in the range today and run out of elevation.I remove the scope and the 20 Mona base they came with the rifle ,using my caliper I measure the base- the barrel end of the bade is lower than the butt stock end,l think it was put backward from the factory.any comment about this,I was going to use PRP for xtc match