KNS Precision L1A1 Duplex Crosshair Black. This Rifle Sight from KNS Precision is a one-piece front sight designed to fit L1A1 post sights. The KNS Precision Front Sight fits any standard A2 front sight post. This KNS Precision Rifle Sight is ideal for minimalist builds where reduced weight is a concern. For a great way to make sure you are using one of the best rifle sights the shooting industry has to offer choose the KNS Precision Front L1A1 Sight. Specifications for KNS Precision L1A1 Crosshair Front Sight: Manufacturer: KNS Precision Gun Model: L1A1 Color: Black Country of Origin: USA Package Contents: KNS Precision L1A1 Crosshair Front Sight What firearm models does the manufacturer say KNS Precision L1A1 Crosshair Front Sight is compatible with? The manufacturer suggests that KNS Precision L1A1 Crosshair Front Sight is compatible with L1A1KNS Precision L1A1DU: L1A1 Duplex Crosshair Black