HKPro.com has a thread going on about HK293, a civlian version(semi-auto with different chamber design?) of G36. It will be named HK243 in EU
HK293 looks more like the actual G36 than the SL8, and has following features
Quad rail system
STANAG magazine system(AR mags can be used)
4 different types of stocks according to The Firearm Blog
They will come in 'K', 'C', 'S', and 'L' versions.
The HKPro.com thread also contains some other photos of classic HK rifles as well as P30 compressed air gun
From: HKPro.com The Firearm Blog