ORIGINAL: bigbulls
HHA DS-XL5519
IMHO the absolute best single pin adjustable sight made. Micro adjustable, completely toolless, incredibly easy to read and make yardage changes, incredibly bright pin that is adjustable with the rheostat housing, and of the best quality I have seen on a bow sight (barring true target sights).
That's the one I use on my Guardian. The Optimizer Elite Ultra. The others I stock are nice but the Ultra is thetop of the line
Dan