I have owned a pair of the 6's for over 8 years. Used them for working AF Rifle ranges for half of that time with up to 20 M-16's going off in a covered range. Love them to death! They work great!

The only change I'd made was to reverse the muffs so that the dished out area at the outer top of the muff is now at the outer bottom. They put that skinny area at the top so that if you are wearing a helmet, it would fit down over the muff, but I don't wear a helmet on the range so reversed it. Now it allows for a good cheekweld when shooting long arms.

OH, did I mention they work great? They are also very light weight and don't slip around when you are on the move. And, they work great!