Catalyst Game Labs has their first preview for the core combat book for Shadowrun 5th edition up.
From the preview:
Did you know that Run & Gun, the Shadowrun, Fifth Edition combat core rulebook is coming soon? And that it will have new weapons, armor, explosives, combat and defense options, martial arts, and more? Did you know the art crew has been doing their usual bang-up job to make things look especially awesome and brutal? Well, all that’s been happening, but we don’t want you to take our word for it. Go check out the first preview for the book instead!