This is a XS Sights Sight known as the Tritium, model AR-2001-6.
XS Tritium stripe front sight for the AR features precision machined stress proof steel" a vertical tritium vial" and white outline to provide front sight visibility in any lighting condition. 0.105" square top post. Each full rotation of front sight gives a 5" shift at 100 yards. Made in the USA. Fits AR front sight housing with front sight detent at 3" 6" or 9 o'clock.
Features:
Green tritium strip front post
Fits AR-15
