KNS Precision Israeli FAL Duplex Crosshair Black. 240 aperture. Crosshair Size .010 / .020 Diameter. Crosshair Material Heat treated. Installation Replaces post sight w/o modifications to gun. Specifications for KNS Precision Israeli FAL Crosshair Iron Gun Sights: Manufacturer: KNS Precision Gun Model: Israeli FAL Color: Black Rear Aperture Size: 0.24 in Country of Origin: USA Package Contents: KNS Precision Israeli FAL Crosshair Iron Gun Sights What firearm models does the manufacturer say KNS Precision Israeli FAL Crosshair Iron Gun Sights is compatible with? The manufacturer suggests that KNS Precision Israeli FAL Crosshair Iron Gun Sights is compatible with Israeli FALKNS Precision FALISDU: Israeli FAL Duplex Crosshair Black