Trumark Slingshot with Fiber-Optic Sights: Model TU-FSXFO. Model FSXFO features fiber-optic sights with rotating prongs. Optic sensors capture light and make the red and green sights glow to help increase accuracy. The prongs extend band life by pivoting 180 degrees. Handle holds SA30 ammo. Aluminum frame and leather pouch. 225 yard range. Made in the USA.