Since when is the M223 optical system coated differently than the Monarch ? In my opinion the optics are identical and the only difference is the turret. Why would Nikon apply a different process and double the part numbers when it would be cheaper to just use the same parts ? If you get the Nicoplex reticle it is exactly the same as on the Monarch. The BDC reticle is different and specifically designed for 55gr 223 ammo. Usually the M223 scope is more expensive than the equivalent Monarch, but there have been some price breaks recently. If that had not been the case I would be owning my own M223 right now, but I couldn't swing it at the time.