KRISS USA G3 QD Sling Mount Black Steel. The additional slots are designed for the G3 M4 adapter. This QD sling mount provides a solid foundation for your sling enhancing your Vector's versatility. Compatible exclusively with Vector Gen 3. Specifications for KRISS USA G3 QD Sling Mount: Manufacturer: KRISS USA Color: Black Fabric/Material: Steel Length: 6.05 in Dimensions: 0.85 X 2.00 X 6.05 in Width: 2 in Frame Color: Black Features of Kriss Usa Kriss G3 Qd Sling Mount Black Compatible only with Vector Gen 3 Package Contents: Kriss Usa Kriss G3 Qd Sling Mount Black Kriss Usa Kriss G3 Qd Sling Mount Black