Me too. I love the sight picture. Large circle for speed. 1 MOA dot for more precision.I like my 553. It does everthing I need it to do very efficiently. The only thing, in my humble opinion, the CompM4 has going for it over any other quality red dot is the AA battery life is phenomenal.
Which do you guys prefer?
The eye relief varies on different ACOG models. My TA31RCO-M150CP in 4x32 is calibrated for and M4 and it does have a short eye relief. It is sighted in mounted well back on on the rail and I usually have the six position stock set in one notch to get the best sight picture from it. But my TA31RCO-A4CP in 4x32 is calibrated for an A4 w/20" barrel and it has considerably longer eye relief.The only thing stopping me from getting an Acog is that the eye relief is too short. less than 3" I believe.