Can you use 209 primers in a knight lk-93?

Yes, check out the Cabela's conversion kit here

http://www.cabelas.com/cabelas/en/templates/links/link.jsp?id=0012617214038a&type=product&cmCat=SEARCH_all&returnPage=search-results1.jsp&Ntt=knight+209&Ntk=Product_liberal&sort=all&Go.y=0&_D%3AhasJS=+&N=0&_D%3Asort=+&Nty=1&hasJS=true&_DARGS=%2Fcabelas%2Fen%2Fcommon%2Fsearch%2Fsearch-box.jsp.form1&Go.x=0&_dyncharset=ISO-8859-1