EA's Battlelog now promises the spring update patch for Battlefield 4 will be released on Tuesday for all platforms, offering a specific schedule for when to expect the hour of multiplayer downtime the update will entail (thanks PC Gamer). They previously outlined the new content this will add to the military shooter sequel, and the announcement offers this summary:

Hot (cold?) on the heels of the Winter Update, we are back once again with a huge Battlefield 4 update. We are definitely not done with providing more awesome content. As previously mentioned, there are 5 new weapons incoming as well as a full weapons balance pass and the return of the party mode “Gun Master”, and what would an update be without some netcode improvements? There is of course a lot more that you will have the chance to read about once we publish the patch notes, so stay tuned for that.