Sold some 5.56mm M855 and some 7.62mm NATO. The gentleman paid me cash for two batches, and asked if I'd take silver bullion for the third. Answer yes. In recent times, I've sold a Smith & Wesson revolver for silver bullion. Also a Colt 1911 for part cash, part silver. Back in the 70's, I sold a Walter PP for US silver coin and a Walther P.38 for silver dollars. Metal for metal.