Shopping for 100 oz Silver Bars APMEX offers a magnificent selection of 100 oz Silver bars. You are guaranteed to receive at least .999 fine Silver. We will ship from our diverse mix of high-quality manufacturers such as Sunshine Minting, U.S. Assay, Geiger, Bison Bullion, Engelhard, APMEX, Johnson Matthey and others. Each bar is hallmark stamped with its precise purity and weight of the Silver content.