Leupold clearly marks the McKenzie line of optics as made in China. I have a pair of McKenzie 10x42 Roof Prism Binoculars and they are clearly stamped "China" then the serial number on the frame. The box says "Made in China". The Rifleman series are advertised as: "like all Leupold's Gold Ring products are designed, machined, and assembled in the United States". I suppose that leaves some room for importing sub assemblies that were manufactured overseas to Leupold specs. I own three Leupold manufactured 2-7x riflescopes, a newish 2-7 VX-1, a late 70's early 80's 2-7 VX-2, and a recent Redfield 2-7x Revolution both new scopes carry the "designed, machined, and assembled in the USA" markings, the older one simply "made in the USA".
I was concerned after reading the above experience so I checked mine out. The two newer ones new in the box and the older one on my Remington 700 7mm Rem Mag where it has been for the better part of 40 years. I compared them side by side looking out my picture window. Not surprisingly the newer scopes were brighter and clearer edge to edge than the older model. Not surprisingly because modern lens designs and multicoatings have come a long way in 40+ years. The newer scopes have click windage and elevation adjustments as well. The older one has friction adjustments. To my 70+ yr. old eyes even the Redfield Revolution economy model was superior to my old VX-II.
I admit I am a Leupold fan boy. MY experience with their products and their service policy has been first rate. They EARNED my respect over the past 50 years.