FWIW:
http://www.thefirearmblog.com/blog/2015/04/10/fnh-usa-release-semi-auto-version-m249-public/
“This morning I headed over to the FNH USA booth at the NRA show to get some exciting details about the new M249S and FN15 military collector’s series. FN is planning on having the 1st 200 models of the M249S to be a “collector’s series”. Said models will ship in a hard case with a 200 round hard boxmagazine with links, FN15 magazine, and spare barrel, along with a certificate. Standard production models will ship with the 200 round box and links.