You can put a rail on the feed cover of any model 249. I highly recommend the para, one quick twist and fold and you're ready for CQB if you want. Mine came as a para, then I swapped in Mk II parts, then put it right back to para. Much nicer to play with. I also highly recommend the G&P RIS front end, very nice piece of kit and solid.
"Anyone with a name like Amanishourbariki should give a few letters to the poor Ng family." - Snarfangel, Fark.com