I brought out my 24" AR15 this past weekend to do some 100 yard plinking. It has an older Mueller 4-16x50 and at 16 power, I noticed a bunch of black specks that I don't recall being there in the past although it has probably been 10+ years since I shot this one. I'm debating whether or not to try and get this one fixed - the image isn't great and the eye box is a little narrow for my aging eyeballs. Would I see a big improvement going from this to a Vortex Strike Eagle 5-25X56?