My complaint - as I've said, I got mine back in 1995 and that was during the Brady Bill & 10 rd clip crisis. When it's tyranny was over, I called HK asking if I could swap out old 10 rd spring for a larger 12 for which the gun was designed.
No - the company purposely designed the 10 rd clips to only hold 10 !!! Warning to all - when these people design something - they mean it.