I carried Smith and Ruger revolvers for several years with adjustable sights. Are they more fragile than fixed sights, common sense says yes but they are not as fragile as many people would have you believe. I carried these revolvers everyday at work and the majority of that time was spent outdoors on foot, ATV, horse, or boat and I can't remeber ever damaging the sights on my revolver, the only time I had a problem was my supervisor was doing a firearms inspection and dropped my revolver, it landed on the corner of the sight blade from about 4 feet on concrete, the sight blade broke. However I did have to reset my sights fairly regularly because the powers that be bought different ammuniton so that would have been a problem with a fixed sighted revolver. With that said I prefer the "fixed" sights on my semi-auto, they can be adjusted by drifting the sights and or replacing with different hight components. Most of the adjustable sights that I have seen on semi autos protrude more and don't appear to be as robust as the sights on the revolvers. Since I can get an exact point of aim/point of impact with the "fixed sight" version I prefer them.