Thanks Dean - yep, same here - I'm just nit picking a bit, the fundamentals of the rifle are sound and as I said I'd say the drop down between the receiver rail and the quad rail is 1/32 of an inch at most. I don't think I would trust (or even want to) mount a scope across the gap even if it were level - so its just a very minor cosmetic issue. I think I might just put a ladder rail cover on it and forget about it!

I'm very much enjoying using this rifle. Not fired a 5.56 since leaving the army 5 years ago, I have solely been using a .308 rifle as a center fire and had gotten completely used to that recoil - dropping down again to 5.56, I'm actually finding it a joy to use....my wallet is, too, with the cost of ammo difference!