[GaryXD]

To me the 5.56 chambering is what makes the AR so attractive. Why not get a 5.56 and shoot Wolf or some other Russian ammo in it?

 

[GaryXD]

The new Wolf ammo is polymer coated and Silver Bear is zinc plated. If you choose a gun (like Bushmaster) with a Nato chamber and chrome lined bore and chamber you probably won't have issues with the cheap ammo.