The new X-ring open sight .22LR barrels are machined from 6061-T6 aluminum, the premium X-ring barrel has been designed to make your urge 10/22 rifle lighter and significantly more accurate. The X-ring barrel fits all urge 10/22 receivers and most aftermarket 10/22 style receivers. Accuracy is enhanced by a rifled chromoly steel liner with a polished 11 degree crown. The X-ring open sight barrel comes with an adjustable green fiber optic rear sight and green fiber optic front sight. Features: Fiber optic sights 1/2-28 thread pitch 1:16 rifling