Ok, so I'm ignorant, so inform me

[DaveTN]

Not only do they not have compatible parts; 308’s don’t have any kind of standard and are not even compatible between manufacturers. Don’t get me wrong, they are my idea of one of the ultimate battle rifles and I have one, but they aren’t mix and match. It’s why parts for them cost so much. I don’t think you can build a 308 AR for what you can buy a quality one for.

[mikegideon]

Humm, may have to check that out then. I got rid of an M4 for the Sig 556 DMR because the Aimpoint was really only useful to about 150 before the dot was bigger than the target. That isn't the only reason. I bought the M4 from the Outpost Armory with the aimpoint. I discovered later that I had to drift the rear sight all the way to the left wall to hit on target, but as near as I could tell the front sight post and frame was perfectly straight. Of course, Outpost didn't care to do anything about it either! I was treated much better at Hero Gear.

The Eotech is gonna be about the same deal. I can just see a dot with it.