I've seen several interesting things today, for example new Walther CCP with HK P7 style piston system, but now I want to cover some more HK stuff.
First of all HK MR223 and MR308 got overhaul to follow changes in HK416A5 and HK417A2 respectively. New civilian rifles have almost all features of military rifles, including RAL8000 color scheme. Almost. They keep heavy barrels and yes, they do not have adjustable gas regulators. Gas block remains same as on older version. Additionally MR308 gets new slim line handguard with Keymod attachment system in place of 3 and 9 o'clock rails.
HK also presented new HKS 243 - civilian G36 version that you can have in several flavors and coloours including classic handguard and folding stock and newest railed handguard and folding/collapsible/cheek-adjustable stock.There also is Keymod handguard for HKS 243 avaliable. Looks like HK really approves and idea.