My last email with Eotech was March 20th and Dennis said he would be sending a new locking bar to see if that would fix my 552. Its now March 28th and no part as of yet. I'll give them until the end of the week and contact them again. I know from installing the sight on three different uppers and two different RRA dominator mounts that the problem is with the rail sight channel, on the sight itself, and not the locking bar. I pointed this out to Eotech and the reply was that they were consulting with Quality Control and waiting until I installed the new locking bar to see if it fixed the problem. Eotech knows there is an issue with how the sight is attached to the rail, but how they choose to fix it is up in the air for now. I will be surprised if they send me another unit again. Eotech replaced the original 552 with a new unit, but the new 552 cants as well.
This is a test case for them to fix. I work for a Sheriff's Office and the boss is waiting to see how they take care of this problem. If not, I hightly doubt the boss will spend money on Eotech to outfit departmental weapons.