This is a Hi-Viz Sight known as the Litewave, model HHVS500.
HIVIZ(R) LiteWave(R) Front and Rear Sight Combo for Henry .357 Mag and 30/30 Win. rifles. Fits H006M" H006MD3" H006MML" H006MR" H006MS" H006MSD" H009B" H009BWL" H010B" H010BWL" H012" H012MR41" H012R models. All sights are fully adjustable for windage and elevation. Front LiteWave(R) sight includes Green" Red and White replaceable LitePipes. Rear sight features two Green" non-replaceable LitePipes.
Features:
Henry Rifle sight set
Green red and white front;Green rear
