I had the opputunity to pick up a EagleArms AR-15 made my Armalite for very cheap so I did it. I noticed the one I picked up had a stamp on the front of the lower receiver which I looked up on their website got some info on it but was wondering if any of you know what that stamp is and what you all thought on EagleArms ar-15's. seem to be a sturdy gun and shoots just as well as my bushmaster.

Try asking this over at AR15.com. They will be able to answer it.
From what I know about Eagle Arms the only real difference between the Eagle and Armalite is finish and warranty. All the really important items are for all intent and purposes the same. I don't think Eagle has stainless barrels but big whoop. I am not certain about what stamp you are referring to. It may just be a company logo like the lion and crosshair Armalite uses.