I bought a used HK 91 earlier this year from a member and I've only had a 3 opportunities to shoot it. Every time I do I am amazed at how accurate this rifle is. I shot a 1.15" group at 100 yards with the diopter sights recently and yesterday I shot at my local indoor 25M range and had a 5 shot group that was one ragged hole dead nuts on from a bench. I was blown away partially because my eyes are not good and for me that was a fantastic group. I know all of you are aware of how awkward mag changes and the lack of an open bolt on empty are but I guess the closed bolt is part of the operating system reliability. I think I would like to add a paddle mag release to make mag changes a bit more smooth. Regardless of these nit picks the more I shoot my HK 91 the more I love it. Obviously it is a heavy awkward bitch but mine is a freaking tack driver. Thinking about buying another to convert to G3K.