South Dakota Codified Laws
Chapter 35 - Firearms, Accessories, And Ammunition
Section 37-35-4 - Made in South Dakota stamp required.

37-35-4. Made in South Dakota stamp required.
A firearm manufactured or sold in South Dakota pursuant to this chapter shall have the words, Made in South Dakota, clearly stamped on a central metallic part, such as the receiver or frame.

Source: SL 2010, ch 198, §4.