The one I put on my .17 mr CZ has worked great all summer,over 1000 rounds through it without a single adjustment,its a 6-24x50.I just ordered one of their new Mark III 6-14x50 30mm with the ranfge finding reticle for my newest 7 mag project,cant wait to get it mounted and have some fun with it.I have had a LEUPOLD come apart on me in the field,there are lemons in all makes,just because a Nc costs 170 instead of 500 dont mean its going to be a POS,I havnt had a single problem with mine.