I'm thinking this might be a good solution for single sling mount (sling off grip) http://www.groundzeroprecision.com/products/stark-equipment-ar-15-ang-sling-grip-se-2?variant=1190842277
To me the FX Impact seems nearly perfect with only 1 exception. It doesn't have the Wildcat's new style loader, that would make the FX Impact a 100% BUY for me.