I have no list but from what I have seen: 1, the throw is 45-semi and 90-auto; 2, the lever is tradition not the oblong dog leg; 3, the handguard has been milled further to cut on weight and vent the barrel further. What I have not seen but have encountered on other European weapons that HK took to court was a heat sink barrel nut with matching handguard bolt system.
This is my two cents and not to be taken as gospel. If someone can find the text in German I will be happy to translate.
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