just installed ameriglo i-dot pros on my g21 and g17. the front sight on the 17 is taller than the front sight on the 21. i thought the 21 should have a slightly taller front than the 17 because of the 21's slightly longer sight radius. why is front on the 17 taller? am i missing something? now i know what your thinking.........the sights with the packaging marked for the 17 made it on the 17.....and the sights in the packaging marked for the 21 made it on the 21. is it possible they put the wrong set of sights in the packaging? or does the 17 truly often have a taller front sight than .45 counterpart when dealing with after market sights? any one? thanks guys.