So experts doing some measuring awaiting my USO ST-10 eye relief calls for 3.8, is that a realistic number? Super proud to say everything in this build comes as (new to me) even considering a second hand Storm I3300 for the sake of saying that every component was resourced from previous owners. Not that I'm hung up on it just have an appreciation. I bought the scope and mount from hide members. The rifle come from th Live free or Die state and I couldn't be happier with my first AR.