Trinity Force Flip-Up Front & Rear Sight Set - Black

"Functional. Work as advertised, with one caveat. The sights themselves are sort of offset to the left side by a noticeable amount. Less than 5 millimeters but noticeable enough to bother anyone who cares about the symmetry. When I say offset, i mean the little sight diopter and fromt sight post are set to the left. Looking at the base pieces of the sights one could observe this as well. Not much of an issue on airsoft guns, though. Scratches somewhat easily, too, but that's a non-issue for me.