I have not installed them as of yet. The POA/ POI issue has me hesitant. On another thread, the OP says they are 4 inches low @ 15 yards. My new 75BD has very dim sights, but they are dead on @ 25, and hitting bulls @50 is dead center aiming at the top of the bull. I may install the rear and try it 1st, and see what changes that makes. I would really prefer to keep the BD sighted in for longer range. CZC has fiber optics in different heights in stock. So I may get with CZC and see what fiber optics are POI @ 50. These TFX have no glo what so ever with out direct sunlight, in total darkness, nothing.. In direct sunlight they glow very bright. So I'm kinda dragging my feet. I really hate to screw up the great accuracy of the 75BD. And the stock sights on my PCR are actually pretty good in low light and do glow in the dark. I really have not quite decided yet what to do. These TRX would make a great set for a daytime range gun.