The umarex strikeforce is modeled after an sbr-style modern sporting rifle with its l-shaped, adjustable, lightweight tactical stock and 10 inch profile barrel, and its m-lok slot equipped hand guard.Use the included removable flip-up iron sights to line up targets or attach a red dot, reflex, or scope to the full-length picatinny rail on top of this modern day bb gun.Caliber: 177Sights: Flip Up Front & Rear