I have used a mk6 h59 for years and it is still my favorite scope. I move it from my dmr to my long range gun to my hunting rifle so It's sort of a jack of all trades for me. I personally like it over the mark 5 because it is shorter, lighter, and has a lower profile elevation turret which I prefer. It could be argued that the mk5 has better glass on the top end but it is very close. I love mine and don't see it being outdated at all especially since I don't really see anything similiar in size and weight. The m5c2 turrets are excellent but stay away from the dogshit "squeeze" turrets.