For a long time it was my goal to build a super lightweight quad that swings 5″ props and is still durable. The perfect frame for this was the Storm SRD199 aka Loki X5 !
It only weighs about 58g with all hardware in the 4mm version, but you can get thicker versions (5mm / 6mm) if you like, check out their stuff at www.helipal.com
The provided screws are orange-colored aluminum and look very cool on carbon.
All available frame versions (also RTF and BNF sets) can be found here: STORM SRD199 Racing Drones
Here is a shot of the assembled frame and components, 244g power house!! 🙂