I learned a lot about the HK91/G3 as I did my research on the C308. The CETME was the ancestor to the HK. Century Arms made a CETME clone that was, by their own admission, hit or miss on getting a reliable rifle. The HK/clone internals are just like the MP-5, just more bigger.
Thom, this one is brutal on brass as well. It ejected the brass 8 - 12 yards, and the fluted chamber really marks up the brass. I think that it would be difficult to reload. I wish the U.S. military would give the issue weapons upon discharge. Of course we are a lot bigger that Finland. The fact that all adult, non-criminal, men in have battle rifles would be an interesting fact to bring up to the anti-gunners. I am going to do some research on that.
The weight, ~9lbs, and the heavy bolt absorb the recoil. I shot the 35 rounds and my shoulder did not get sore at all, couldn't do that with my son's Remington 700!