I don't have this gun or sight but I know what it looks like. Any chance you have something that is smooth jawed. Like Knipex pliers wrenches? Or alternatively wrap a bunch of tape or get slip on jaw covers for pliers or something so you could cautiously bend it without damaging the surface? If a hammer is the answer, maybe a nylon or dead blow plastic style of hammer?
I find it annoying when people ask for help and then abandon the thread.But, I do feel the urge to clarify something:For most of the airguns in the DIANA line, I would agree with Ilimakko. Iron sights are not that good. BUT, but for the K-98 (Spring) and some versions of the 34 and the 54, the sights are "Prremium" and well above anything else offered by any other manufacturer.But let's stick to the OP:The K98's front sight is a reasonable functional replica of the original military model, because the original shot only ONE projectile at a given ballistics specifications, there was no need to make it too adjustable, BUT for pellets, the need for adjustability required some creative thinking.So, the front sight of the K-98 (spring) is adjustable for elevation:The sight has a locking screw and the box comes with the needed tools to adjust this sight.The rear sight has micrometric clicks for both windage and elevation:Overall, the sight picture allows very precise shot placement, given proper eyesight: I hope these pictures make it clear why I have repeatedly written that the K-98 (Spring) iron sights are among the best, if not THE best open sights in airguns presently made.Keep well and shoot straight!HM
Smooth jawed pliers by the german company Knipex are really great for metal bending and as an alternative to adjustable wrench/crescent wrench. I have all of their sizes from 5 inches up to their 12 inch model for home repairs, bending the odd piece of metal that I don't want to marr, etc. Big fan of them, learned about them through garagejournal's tool forum. Your sight looks pretty good... just seems like the hood is slightly off. Could that even be just adjusted with a little pressure from your hand?