I’ve never used open sights before, this is my first time. I zeroed my AR at 100yds with M193 and came up with about a 3"... maybe 3.5" group at the end of the day. Is that good or bad? next I want to try some premium loads in .223 to compare, but that’s another day. I'm not certain how accurate M193 is nore what others get with iron sights. 3" MOA doesn’t even compare to what I’m used to with a scope especially at 100yds... does anyone use iron sights what MOA do you get at 100yds?