I would love to see devs take on a Futuristic M4 model to fit in with the year 2035, i can still imagine this weapon been used in service in the future but modified and enhanced version. it would also bring back an old friend for many arma players :). You could give the m4 a 6.5 calbier to sit along side the MX.
Just a simple request from a huge fan of the arma series and i would love to see up votes for this , even if they released them as DLC i would buy them ;)